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Is it best to do long charges then let it drain, or is it safe to for example use the phone ten mins and put it back on the mat for ten then use again and so on. Does constantly charging mess things up?
Thanks.
swainclubber said:
Is it best to do long charges then let it drain, or is it safe to for example use the phone ten mins and put it back on the mat for ten then use again and so on. Does constantly charging mess things up?
Thanks.
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Click to collapse
Your phone's battery should be fine as long as it's not overheating.
Most of today's batteries are built to last, which means if you are actually abusing wireless charging, you will start noticing not before 1 year from now(estimated.). And by then, most people have switched their devices. Therefore, it might be damaging you battery, I'm not an expert, but you should not start seeing any bad impact on your phone in the near future.
Other people's opinions might be more helpful than mine, but you should keep this in mind.
Cheers for your opinion. All are greatly appreciated.
guetzli32 said:
Your phone's battery should be fine as long as it's not overheating.
Most of today's batteries are built to last, which means if you are actually abusing wireless charging, you will start noticing not before 1 year from now(estimated.). And by then, most people have switched their devices. Therefore, it might be damaging you battery, I'm not an expert, but you should not start seeing any bad impact on your phone in the near future.
Other people's opinions might be more helpful than mine, but you should keep this in mind.
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Click to collapse
Right on, and by this time next year the OEM batteries will be cheaper and thus just replace them
Sent from my SAMSUNG-SM-G900A using XDA Free mobile app
swainclubber said:
Is it best to do long charges then let it drain, or is it safe to for example use the phone ten mins and put it back on the mat for ten then use again and so on. Does constantly charging mess things up?
Thanks.
Click to expand...
Click to collapse
Almost no one charges batteries the ideal way.. well, because it's inconvenient to do so. Fortunately battery technology is getting better every year, batteries take longer to wear out and are (slowly) getting cheaper to replace when it comes to that.
The ideal way to charge a battery depends on the type of battery. The S5 uses a lithium ion batteries. Ideally you would charge a Li-ion battery slowly, not deep cycle it, protect the battery from hot environments and (idealy) stop charging around 85%.
Heat is the major enemy, battery life is shortened by a factor of two for every 10°C increase above 25°C. High cell voltages and cycling would fill out the top three list of things you'd like to avoid to maximize battery life.
So what does all that mean? Frequent wireless charging is beneficial if your battery charge is < 85%, because you don't want to deep cycle and slow charging (which wireless is) is better than a fast charge cycle for battery life. And a moderate stress if you are charging it when the battery is > 85%. Do what you can to avoid high heat e.g. don't leave your phone in a very hot car on a sunny day if you can avoid it. And if you go Skiing or store your phone in a freezer for some reason.. let it warm up a bit before trying to charge it.
Most of us will charge our phones even if the battery charge is > 85% though because we want to maximize run time, even though the higher voltages above 85% are a detriment to battery life. It's a trade off between utility and battery life. Battery life is conservatively specified around 500 charge cycles these days.. but that is a loosely defined term with a lot of associated variables. Depending on how you use your phone.. your battery may go six months, a year, even two years before you notice that your run time just doesn't cut it anymore.
I'd say don't worry about wireless charging. Charge it as frequently as you like. But try to keep your phone cool (out of the sun) when you can.
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Cheers for that appreciated. However wireless charging on my setup involves a fair amount of heat
Wireless charging is relatively inefficient. Which means that there will be some waste heat generated. But it varies substantially on the brand of charger and whether you are using an resonant or inductive design. My wireless charger produces minimal heat.
Unless you measure the temperature.. it's hard to gage whether the heat from yours is a serious issue or not. Mine increases the surface temperature ~ 5C.
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Would you mind sharing which charger you use?
fffft said:
Wireless charging is relatively inefficient. Which means that there will be some waste heat generated. But it varies substantially on the brand of charger and whether you are using an resonant or inductive design. My wireless charger produces minimal heat.
Unless you measure the temperature.. it's hard to gage whether the heat from yours is a serious issue or not. Mine increases the surface temperature ~ 5C.
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lordhamster said:
Would you mind sharing which charger you use?
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Click to collapse
How good are you with Orcad and a soldering iron?
I built my own @ 3.57 Mhz, which is also a non-standard (but very efficient) coupling frequency.
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swainclubber said:
Is it best to do long charges then let it drain, or is it safe to for example use the phone ten mins and put it back on the mat for ten then use again and so on. Does constantly charging mess things up?
Thanks.
Click to expand...
Click to collapse
Lithium-ion battery nowadays does not have memory effect. So constant recharging and disconnecting is fine.
Cheers folks.
I'm wondering if the heat I hear about being generated before the charging rate slows down after 50% would have any negative impact on battery life. Would there be any benefit in using my multi-port charger for overnight charges when I am not in a hurry to charge the battery?
Also, I assume that the battery doesn't have any memory, and that there's no reason to break it in, fully discharge periodically, etc. and that it's okay to charge a little or a lot regardless of the current charge state. Is that correct?
This is a question i would like to know the answer to as well
I did a slow charge last night and the battery seemed to discharge s little slower this morning fwiw, but that's not terribly scientific.
Sent from my XT1575 using XDA Free mobile app
There's already a thread for this. No, it doe not harm battery life.
Darnell_Chat_TN said:
There's already a thread for this. No, it doe not harm battery life.
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Could you please point me towards that thread? I didn't locate it with a few search combinations. Thanks.
Mississip said:
I'm wondering if the heat I hear about being generated before the charging rate slows down after 50% would have any negative impact on battery life. Would there be any benefit in using my multi-port charger for overnight charges when I am not in a hurry to charge the battery?
Also, I assume that the battery doesn't have any memory, and that there's no reason to break it in, fully discharge periodically, etc. and that it's okay to charge a little or a lot regardless of the current charge state. Is that correct?
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Click to collapse
Fast Charging Lithium = Battery damage. It's basic chemistry. The cells take mechanical damage from expanding too quickly. So, for best longevity, charge her with like a .7 to 1 amp charger.
Locklear308 said:
Fast Charging Lithium = Battery damage. It's basic chemistry. The cells take mechanical damage from expanding too quickly. So, for best longevity, charge her with like a .7 to 1 amp charger.
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Click to collapse
wrong. the only thing that damages cells is charging beyond the voltage specifications. How fast you dump electrons in has no negative effects, its only when you put too many in that batteries get damaged.
Locklear308 said:
Fast Charging Lithium = Battery damage. It's basic chemistry. The cells take mechanical damage from expanding too quickly. So, for best longevity, charge her with like a .7 to 1 amp charger.
Click to expand...
Click to collapse
Thank you. I had thought the same thing. No one had the time to give me any detailed information, so I researched. I can't post links, but the following articles are helpful and will show up first in a search for the title
'Will speed chargers kill your battery?'
'BU-401a: Fast and Ultra-fast Chargers'
A conventional phone charger can only supply the current and voltage that is safe for a battery at all charge levels. In other words, it is must use the least common denominator. Quick Charge makes this process much more active by monitoring max current, max voltage, and temperature so that it can supply more power when it is safe and less power when it is not. Quick Charge will always keep the current, voltage, and temperature within the battery's designed specifications.
In terms of battery memory effect, no, modern lithium based batteries do not have any sort of memory-like effect. This is mostly associated with older and cheaper NiCad type batteries. This is one of those things that people seem to have a really hard time moving past.
People worry far too much about babying their battery.
Assuming you are going to use the phone for ~2 years then a properly designed fast charger should have a negligible effect on battery life. After 2 years of continuous usage all bets are off whether you used a fast charger or not.
If you really want to worry about how to treat your battery then there are two things you should try not to do. Don't let the battery go all the way to 0% and let it sit like that for a year. Don't leave your phone on your dash in direct sunlight everyday. Outside of those two things there's not much you can do to change the lifetime of your battery so just use the damn thing. =P
dalingrin said:
A conventional phone charger can only supply the current and voltage that is safe for a battery at all charge levels. In other words, it is must use the least common denominator. Quick Charge makes this process much more active by monitoring max current, max voltage, and temperature so that it can supply more power when it is safe and less power when it is not. Quick Charge will always keep the current, voltage, and temperature within the battery's designed specifications.
In terms of battery memory effect, no, modern lithium based batteries do not have any sort of memory-like effect. This is mostly associated with older and cheaper NiCad type batteries. This is one of those things that people seem to have a really hard time moving past.
People worry far too much about babying their battery.
Assuming you are going to use the phone for ~2 years then a properly designed fast charger should have a negligible effect on battery life. After 2 years of continuous usage all bets are off whether you used a fast charger or not.
If you really want to worry about how to treat your battery then there are two things you should try not to do. Don't let the battery go all the way to 0% and let it sit like that for a year. Don't leave your phone on your dash in direct sunlight everyday. Outside of those two things there's not much you can do to change the lifetime of your battery so just use the damn thing. =P
Click to expand...
Click to collapse
Exactly.
dalingrin said:
A conventional phone charger can only supply the current and voltage that is safe for a battery at all charge levels. In other words, it is must use the least common denominator. Quick Charge makes this process much more active by monitoring max current, max voltage, and temperature so that it can supply more power when it is safe and less power when it is not. Quick Charge will always keep the current, voltage, and temperature within the battery's designed specifications.
In terms of battery memory effect, no, modern lithium based batteries do not have any sort of memory-like effect. This is mostly associated with older and cheaper NiCad type batteries. This is one of those things that people seem to have a really hard time moving past.
People worry far too much about babying their battery.
Assuming you are going to use the phone for ~2 years then a properly designed fast charger should have a negligible effect on battery life. After 2 years of continuous usage all bets are off whether you used a fast charger or not.
If you really want to worry about how to treat your battery then there are two things you should try not to do. Don't let the battery go all the way to 0% and let it sit like that for a year. Don't leave your phone on your dash in direct sunlight everyday. Outside of those two things there's not much you can do to change the lifetime of your battery so just use the damn thing. =P
Click to expand...
Click to collapse
I had researched the topic and learned what you have stated, but I really appreciate you taking the time to write this fuller explanation. I wished to take every reasonable precaution to maximize battery life, given the battery is not easily replaced.
There have been references published claiming that charging faster (higher current) shortens overall Li-Ion battery life.
Mechanism may be related to heat.
One thing the Qualcomm Quick Charge 2.0 (used in the Snapdragon 808) does is increase voltage at the charger from standard USB 5V, to 9V and 12V, for higher charge rates (power) at still-moderate current (to keep heat dissipation down).
I measured 1.1 to 2.3 amps at ~9V with QC 2.0 charger on the MXPE, with the higher current measurements at lower State of Charge (SoC). Have not seen 12V yet, but I only tried it down to 45% SoC (2.3 amps at 9V), I imagine it bumps up to 12V when the battery is discharged further, nearer to complete discharge.
This charger is rated for
5V, 4A
9V, 2.22A
12V, 2.5A
20V, 1.0A
So the max power fed to the battery would be 28W (12V*2.5A).
(This is the Power Partners PEAW30-12-USB, supposedly a 30W charger. So much for integrity in advertising.)
So the current is kept to a manageable level to control heat dissipation (therefore max temperatures), from the charger to (somewhere in the phone). But I believe that at the battery itself, more rapid charging (higher power) would still require higher current, because voltages have to be limited in the battery itself, so one would think heat dissipation (> max temperatures) would still be a problem in the battery itself. Does that shorten battery life?
The answer is probably: Who cares. Because: Li-Ion batteries have a 2-3 year life in any case, regardless of their service life or even if they are not used at all. They age and exhibit substantial capacity decline over time. Discharge/charge cycles hasten the capacity decline, but the battery is only good for 2-3 years, give or take, no matter what. And since aftermarket replacement batteries are inferior, unsafe, and stale, there is no reason to try to hang on to your phone for more than 2-3 years in any case. (Especially since the "non-user-replaceable" batteries can be a pain in the a** to R&R. The Moto X Pure 2015 battery is one of those. Some phones actually incur permanent damage to seals if the battery is removed/replaced - the Kyocera Hydro Wave is this way.)
You say "but you could replace the battery with an OEM battery". There are two types of OEM Li-Ion phone batteries on the market that an individual consumer can buy retail, when their phone is 2 years old or more: Used stale batteries (look up "reverse logistics"), and "new" (i.e. not put into service yet) stale batteries. Good luck finding a fresh, new OEM Li-Ion battery for your 2 year old or older phone (out of production for at least a year).
Been down this road before. Wasted lots of time and money replacing phone batteries after 2-3 years. From now on I'm going to stop coddling phone batteries, stop replacing them after 2-3 years, and just figure on a new phone every 2-3 years. It's the only way to get a fresh, new Li-Ion phone battery. (And get the phone right when it is released, like the MXPE this month. That way you are more sure the battery is fresh.)
I think everything in the wireless phone paradigm is increasingly heading that way anyway. Everything, and I mean everything, pushes the market to a 2 year product life cycle. Batteries last 2 years. Increasingly, batteries are not made to be replaceable. Carriers are changing networks so fast you need a new phone every 2 for that alone. New OS/SW overloads hardware older than 2 years. Displays may fade over a couple years. USB connectors wear out. Just relax and go with it. Marvel at the Qualcomm Quick Charge 2.0 (I am). You'll be happier with a new phone every 2 years.
Sorry for the long rant.
Sorry for the kind of off topic, but it's kind of related... is it okay to use other devices with the included fast charger? I just hate having 2 micro usb chargers plugged in, when I could use just one
Sent from my XT1575 using XDA Free mobile app
crash613 said:
Sorry for the kind of off topic, but it's kind of related... is it okay to use other devices with the included fast charger? I just hate having 2 micro usb chargers plugged in, when I could use just one
Sent from my XT1575 using XDA Free mobile app
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Click to collapse
Yes, the Moto Turbo Charger can be used with any MicroUSB charging device. It will adjust charging as needed for the individual device. Moto made the Turbo Charger, to be a single charger for all MicroUSB devices.
If the battery is kept well charged, which Turbo Charging helps to accomplish. That's better to me, than more drain and slower chargers that leave the battery more drained overall. The batteries are supposed to last longer when kept fully charged more often.
crash613 said:
Sorry for the kind of off topic, but it's kind of related... is it okay to use other devices with the included fast charger? I just hate having 2 micro usb chargers plugged in, when I could use just one
Sent from my XT1575 using XDA Free mobile app
Click to expand...
Click to collapse
"...since Quick Charge 2.0 is compatible and interoperable, a certified adapter can be used with a non-Quick Charge 2.0 device, though the fast charging benefits of Quick Charge 2.0 will not be available. "
https://www.qualcomm.com/products/snapdragon/quick-charge/faq
By all appearances, Motorola's "TurboPower™ Charging" is nothing more than Qualcomm Quick Charge 2.0. (That's what Snapdragon 808 in the XT1575 uses.)
The third-party Qualcomm Quick Charge 2.0 chargers I bought are recognized as "Turbo" and function with the XT1575, just like the Motorola charger that came with the XT1575.
(There are a LOT of Qualcomm-certified QC 2.0 chargers for sale by third-party names. Qualcomm has been BUSY. )
To slow charge a S7, do we have to turn off fast charging from the settings and then charge via the charger that came with the phone(the so called fast charger) or should we use a charger from an old phone say SIII etc.?
Does this hold true for Motorola's phone also which have turbo charging option?
Also how to measure battery cycles? Any credible app for the same?
billubakra said:
To slow charge a S7, do we have to turn off fast charging from the settings and then charge via the charger that came with the phone(the so called fast charger) or should we use a charger from an old phone say SIII etc.?
Does this hold true for Motorola's phone also which have turbo charging option?
Also how to measure battery cycles? Any credible app for the same?
Click to expand...
Click to collapse
Moto doesn't have the option in settings, it uses industry standard Qualcomm Quick Charge standard rather than a OS hack like Samsung (no offense)... If it is connected to a QC 2.0 charger, it will negotiate the appropriate charge rate, if it is connected to a "standard" charger it will charge normally.
I don't think you can accurately measure battery/charge cycles... even if you could it would be extremely deceiving, what would be considered a cycle? Charging at 50%, 30%, 10%, and to what point 75%, 80%, 100%? Too much room for interpretation here that could be swayed either way depending on the person/app counting it's point of view.
acejavelin said:
Moto doesn't have the option in settings, it uses industry standard Qualcomm Quick Charge standard rather than a OS hack like Samsung (no offense)... If it is connected to a QC 2.0 charger, it will negotiate the appropriate charge rate, if it is connected to a "standard" charger it will charge normally.
I don't think you can accurately measure battery/charge cycles... even if you could it would be extremely deceiving, what would be considered a cycle? Charging at 50%, 30%, 10%, and to what point 75%, 80%, 100%? Too much room for interpretation here that could be swayed either way depending on the person/app counting it's point of view.
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Click to collapse
Thanks for replying dear. So, for S7 I have turned off fast charge, should I now charge via the charger that came with the phone(the so called fast charger) or should we use a charger from an old phone say SIII etc.?
For Moto G, the question is the same as above.
Of the little what I have understood from various threads here is to charge the battery when it is between 20-40% to 80-90% if you want to have a good battery life. I used to do the complete opposite charge, when the battery is at say 6-7% and charge it till it is maxed. I used to do the same for my laptop, any other tip for the battery?
And I have signed your petition Brother. I hope they listen to the users.
billubakra said:
Thanks for replying dear. So, for S7 I have turned off fast charge, should I now charge via the charger that came with the phone(the so called fast charger) or should we use a charger from an old phone say SIII etc.?
For Moto G, the question is the same as above.
Of the little what I have understood from various threads here is to charge the battery when it is between 20-40% to 80-90% if you want to have a good battery life. I used to do the complete opposite charge, when the battery is at say 6-7% and charge it till it is maxed. I used to do the same for my laptop, any other tip for the battery?
And I have signed your petition Brother. I hope they listen to the users.
Click to expand...
Click to collapse
Does Fast Charge hurt the battery life, no, at least not directly... heat does. Using an older style charger will avoid Quick Charging but I think that foregoing that benefit for a few more days of battery life is hardly worth it. I frequently have 30-60 minutes to charge, not 3-5 hours, so quick charge is nice, if it takes few days off the longevity of the battery so be it. Those who think it cuts the battery life by 20, 30, even 50% are wrong, that simply isn't the case because of Fast Charge itself.
The Moto G isn't an issue here, it doesn't support Quick Charge until the 4th generation, but why give up the feature?
I don't think the "rules" of charging apply as much as people think they do... I charge mine overnight and whenever it needs it during the day, if it does. There is no need to do anything special.
acejavelin said:
Does Fast Charge hurt the battery life, no, at least not directly... heat does. Using an older style charger will avoid Quick Charging but I think that foregoing that benefit for a few more days of battery life is hardly worth it. I frequently have 30-60 minutes to charge, not 3-5 hours, so quick charge is nice, if it takes few days off the longevity of the battery so be it. Those who think it cuts the battery life by 20, 30, even 50% are wrong, that simply isn't the case because of Fast Charge itself.
The Moto G isn't an issue here, it doesn't support Quick Charge until the 4th generation, but why give up the feature?
I don't think the "rules" of charging apply as much as people think they do... I charge mine overnight and whenever it needs it during the day, if it does. There is no need to do anything special.
Click to expand...
Click to collapse
Thanks for the wonderful and detailed reply. I am going to try, not stick, to slow charging to see the difference in heating of the battery. My SIII's charger 's input is 150-300VAC, 50-60 hz 0.15AA, output- 5.0V-1.0A and S7's details are input 100-240V 50-60hz 0.5A, output- 9.0V= 1.67 A or 5.0V=2.0A. Can I use the S3's charger to charge S7 after turning of fast charge or is there a voltage difference or something? G4 is at home, don't know about its details. Also in my country the battery or the replacement parts are way too expensive.
Method:
First I used my phone until the battery was below 15% in order to get a better picture of what the charging would look like over almost a full battery cycle. I did not start at the same battery percentage for each test because I did not find any benefit to doing so. I original did this for uniformity, but it did not make a difference after trying it using the more accurate equipment.
I then cleared my history in the Battery Monitor Pro Widget (BMW Pro) recording app which was used to log the battery [mV], battery temperature [F], time, and battery percentage changes. Once this was done I plugged in my USB Power Monitor, turned airplane mode on, removed the case, and let the phone charge. I started logging the data via my power monitor once the phone showed it was charging. From this point onward I let the phone charge without interrupting it until it reached 100%, then I let it charge for another 10-60 minutes to see if it was still drawing power from each charger. Once all of this was done, I exported my data collected from BMW Pro, emailed it to myself, and pasted it along with the USB Power Monitor data into an Excel spreadsheet. All of the data was then delimited to separate the clusters of data due to the way they were recorded, and subsequently graphed. The USB Power Monitor recorded data points every 0.36 seconds, while the BMW Pro took recordings every 5 seconds because I was having issues with the “real-time” recording option in the app working correctly.
All of the data was then graphed into the nice figures you will see below; each color reflects the same variable across all of the graphs to make reading them easier. I included a legend at the top of each set of graphs which should also help make it easier to read the data.
The most interesting part of this test is how cool the S7 Edge stays while charging, and the very marginal difference in overall charging time between QC 2.0/1.0. A 15-minute gap is marginal at best given the ‘big improvements’ Qualcomm claimed when launching the newer standards.
When conducting the wireless charging tests I think there is some error in the Samsung Fast Wireless charging data, so I plan on redoing it at some point. I already redid the Choetech one because it has a similar strangely long, but now it seems more in line with what I initially found before using the newer testing equipment.
I wanted to also quickly point out that both my HTC 10 and S7 Edge keep pulling current even after the phones show they are 100% charged. I’m not talking about a tiny amount; they both pulled ~1-5W+ after hitting 100% battery which is A LOT considering they are reporting to be fully charged. I verified this using 3 multimeters just to be sure. It appears as if Qualcomm, or the OEM’s are falsely reporting when the phone is actually charged, or there’s some other shady things going on here.
Another thing I wanted to mention is how the S7 Edge is so consistent in the way it charges the battery. It could be due to the lower rates Samsung uses (9V/1.67A max which is 15.03W) vs the HTC 10’s up to 18W that I’ve seen it pull. Just take a look at how the S7 Edge charges using QC 2.0 compared to the HTC 10 with lower temperatures, similar times, and a much more consistent overall charging curve.
If you look at the Tronsmart & Choetech QC2.0 tests, then you might notice the large difference between the two. The Tronsmart charger has a harder time holding onto the proper voltages, therefore it bounces around more from ~8.92V-9.03V (a 0.11V change) while the Choetech one ranges from 9.077V-9.092 which is a significantly smaller 0.015V range. The power control chip is responsible for controlling these voltages, and clearly the Choetech one has a better chip in it. This is especially important for external battery packs where efficiency really matters due to the limited amount of power they can store.
Equipment:
These tests were conducted using a series of different chargers. The same brand was used for both Quick Charge 2.0/3.0 tests to minimize experimental error; This trend remained the same was also done for the wireless charging tests
Wall Chargers:
Quick Charge 2.0: Tronsmart 18W charger 5V/2A, 9V/2A, 12V/1.5A
Quick Charge 3.0: Tronsmart 18W charger 3.6-6.5V/3A, 6.5-9V/2A, 9-12V/1.5A
USB inline Power Monitor:
XYZ Studio 0-24V, 0-3A USB Power Monitor
Tronsmart 5-12V USB multimeter (not used in this test, but was used in the older version)
Software/App(s):
Battery Monitor Widget Pro
Excel
Notepad++
Realterm (for the USB power monitor logging)
Legend
QC 2.0 Tronsmart S7
QC 2.0 Choetech
QC 1.0 Samsung
Choetech Fast Wireless Charger
Samsung Fast Wireless Charger
Samsung Wireless Charger
Normalized data Table
Full sized downloadable pictures of everything (data wise) you see above.
very good stuff!
maybe you could also record the heat at the hottest spot of the phone during charging? I think qc3 has the same charge rate but its able to change voltage to reduce creating waste heat compared to qc2.0.
my main concern with the s7 is the battery life, i know it won't last me a full 18hr day so i really need a portable fast qc2 charger that is pocketable, so maybe 5000mah, but have not seen such a small qc charger tho
Excellent post and well-made graphs. Thanks for your efforts.
well done. good info here.
sonhy said:
very good stuff!
maybe you could also record the heat at the hottest spot of the phone during charging? I think qc3 has the same charge rate but its able to change voltage to reduce creating waste heat compared to qc2.0.
my main concern with the s7 is the battery life, i know it won't last me a full 18hr day so i really need a portable fast qc2 charger that is pocketable, so maybe 5000mah, but have not seen such a small qc charger tho
Click to expand...
Click to collapse
I don't have a thermal camera, or way to do that otherwise I gladly would. I can recommend a small 6000mah external battery pack if you want; Ill do a quick write up too (if you need one). The Samsung charger stayed at 9V the whole time per my multimeter's reading it just dropped go .5A near the end.
CLARiiON said:
Excellent post and well-made graphs. Thanks for your efforts.
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ISperfection said:
well done. good info here.
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Click to collapse
Thank you, I will add in a standard wireless charger test (since my free Samsung one is enroute), and I can also get their fast charger too. I believe Samsung's fast wireless charger is only 7W so it would be slower than the Choetech one but it never hurts to see how fast it is.
Sent from my Nexus 6P using XDA Labs
@Pilz yes pls let me know of a qc2.0 small portable charger I think a quick 30mins charge to add 50% battery life mid day will be the best ease-of-use solution for me.
with the heat measurement, I'll be happy with your commercial grade temperature sensor that the great designer created for you, your fingers or better yet, the inside of your wrist.
preferably touching the same area on the phone every time and grading something like 1-5 hot/comfort levels maybe? just suggesting, no pressure
sonhy said:
@Pilz yes pls let me know of a qc2.0 small portable charger I think a quick 30mins charge to add 50% battery life mid day will be the best ease-of-use solution for me.
with the heat measurement, I'll be happy with your commercial grade temperature sensor that the great designer created for you, your fingers or better yet, the inside of your wrist.
preferably touching the same area on the phone every time and grading something like 1-5 hot/comfort levels maybe? just suggesting, no pressure
Click to expand...
Click to collapse
I'll look into some methods to measure the heat easily while they're charging. I'm conducting the standard wireless charger test using my free Samsung wireless charger right now QC 2.0 chargers the fastest when you start at a very low battery percentage, so ideally you can achieve the results posted, but ambient temperature, starting % etc contribute to whether or not that's attainable. It's still a good estimate for 30 minutes of charging +/- 5% for other factors. The phone also chargers slower when the screen is in. The rate would go from 9V/1.67A to 9V/1.10A with the screen on. It was very consistent when I turned the screen on and off during the test.
Sent from my Nexus 6P using XDA Labs
i actually won't care about heat issues while charging this time round, it'll be like my moto defy, i just run it under cold water after a fast hot charge, wont be using the s7 for many years so not worried about moisture build up.
i have ordered a magnet micro usb cable that says its rated for 2.4A charging so hopefully it'll allow easy qc2.0 charging, no need to plug in, it magnetically snaps on and off.
i think the best charge setup would be a 30mins quick charge (magnet) on the office desk than a 60mins wireless qi charge, carried in your pocket type situation.
sonhy said:
i actually won't care about heat issues while charging this time round, it'll be like my moto defy, i just run it under cold water after a fast hot charge, wont be using the s7 for many years so not worried about moisture build up.
i have ordered a magnet micro usb cable that says its rated for 2.4A charging so hopefully it'll allow easy qc2.0 charging, no need to plug in, it magnetically snaps on and off.
i think the best charge setup would be a 30mins quick charge (magnet) on the office desk than a 60mins wireless qi charge, carried in your pocket type situation.
Click to expand...
Click to collapse
Did you by chance order the Znaps? I backed them ages ago for both the Type-C and micro USB connectors. If I'm lucky I might eventually maybe sometime before I die receive them. I don't expect much from a kickstarter campaign that's been delayed this much. I'm finishing up the standard Qi/PMA charging test. It shouldn't matter the standard it's using but if it's important the Samsung wireless charger is actually PMA.
Sent from my Nexus 6P using XDA Labs
OP Updated
-Standard wireless charging test added
-All figures updated to reflect the new test
no, its from aliexpress, $10 or so, ive seen cheaper so I would say the poor Kickstarters had their designs stolen and made cheaper... im not sure, i just buy what's available and easy. just search magnet usb cable, you'll find heaps, the more exy ones claim 2.4A current rating.
sonhy said:
no, its from aliexpress, $10 or so, ive seen cheaper so I would say the poor Kickstarters had their designs stolen and made cheaper... im not sure, i just buy what's available and easy. just search magnet usb cable, you'll find heaps, the more exy ones claim 2.4A current rating.
Click to expand...
Click to collapse
Let me know how it works, I rarely use cables to charge my phone becusse I hate micro USB ports plus I'm used to the type C on Nexus.
Sent from my Nexus 6P using XDA Labs
Have you tried charging with 18w charger(not wireless) rather than the samsung one?
peachpuff said:
Have you tried charging with 18w charger(not wireless) rather than the samsung one?
Click to expand...
Click to collapse
Yes it doesn't matter becuase the phone is only rated for 15.03W so it can't use more than that no matter the charging method. See screenshot below:
Sent from my Nexus 6P using XDA Labs
@Pilz yeah sure, it should arrive in a couple of weeks. i hate plugging in as well, even with the usb type c, its reversible but finding the port isn't always easy, they should have made the port surface like a cone or funnel so your guided into the port more easily.
the use of the magnet is awesome, Sony's external side charging pins have been around for ages, its really the charging current and quality of the copper that im worried about.
sonhy said:
@Pilz yeah sure, it should arrive in a couple of weeks. i hate plugging in as well, even with the usb type c, its reversible but finding the port isn't always easy, they should have made the port surface like a cone or funnel so your guided into the port more easily.
the use of the magnet is awesome, Sony's external side charging pins have been around for ages, its really the charging current and quality of the copper that im worried about.
Click to expand...
Click to collapse
I just wish they had Type-C because its so much better especially after using it for a while now.
Sent from my Nexus 6P using XDA Labs
I never knew that plugging in a micro USB cable was so difficult. It could be one of those things that once you try a better alternative (type c maybe?) makes you ask how you lived without it, but I don't see what the fuss is about just yet.
I've used wireless chargers for years (way back in the NExus 5 days even) including in the car. Any word on fast wireless charging and heat? I'm worried about it pumping a ton of heat on to the back of the phone especially for extended periods such as overnight.
xxaarraa said:
I never knew that plugging in a micro USB cable was so difficult. It could be one of those things that once you try a better alternative (type c maybe?) makes you ask how you lived without it, but I don't see what the fuss is about just yet.
I've used wireless chargers for years (way back in the NExus 5 days even) including in the car. Any word on fast wireless charging and heat? I'm worried about it pumping a ton of heat on to the back of the phone.
Click to expand...
Click to collapse
Micro USB is just more of a hassle becusse usually you need to angle it while inserting it into the phone. Type-C is nice becuase there no worrying about how I need to orient a cable when I'm half awake plugging my phone in. It's hard to understand why its nice until you use it everyday.
I haven't been able to measure the heat yet, but the phone is cooler using the 10W wireless fast charger than it is using QC 2.0. The phone isn't hot to the touch but it is warm using the fast wireless charger. I'll try to download a battery monitoring app that measures battery temp while it's charging. This method won't be as accurate as physically measuring it, but it should still give a good indication of the temperature.
Edit: I tested the temperature using GSAM battery montior via the fast wireless charger fro ~6% charge (28-34%) and the temperature rose 6 [F], the I let the phone cool and tested QC 2.0. The phone was charger for 6% to keep things cosnistent with a temperature change of 5[F]. I would need to find a way to more accurately measure these values because that quick test doesn't really mean anything at this point.
Sent from my Nexus 6P using XDA Labs
Does the Adaptive Fast charging by Samsung with with QC 2.0 compatible devices or is it only exclusive to Samsung?
ahrion said:
Does the Adaptive Fast charging by Samsung with with QC 2.0 compatible devices or is it only exclusive to Samsung?
Click to expand...
Click to collapse
It's just a QC 2.0 charger from what I can tell. I have a battery pack that will charge using QC 2.0 so I can test it using my multimeter
Sent from my Nexus 6P using XDA Labs
Maybe this is old news but today I learned that the YotaPhone 2 charger shipped with the phone is actually Qualcomm Quickcharge 2.0 compatible. This means you can also charge other Qualcomm Quickcharge 2.0 compatible phones with it, like my other phone the Moto G4+. Works perfectly.
Yes, I've been using my QuickCharge 3.0 charger and it's charging with 9V ~1,3A.
kbal said:
Yes, I've been using my QuickCharge 3.0 charger and it's charging with 9V ~1,3A.
Click to expand...
Click to collapse
Dont, fastcharging will greatly reduce you battery life.
Enviado desde mi SM-N930F mediante Tapatalk
kingtiamath said:
Dont, fastcharging will greatly reduce you battery life.
Enviado desde mi SM-N930F mediante Tapatalk
Click to expand...
Click to collapse
Although it is true it reduces your battery life it is only by a small margin, nog greatly.
VirtuaLeech said:
Although it is true it reduces your battery life it is only by a small margin, nog greatly.
Click to expand...
Click to collapse
Im afraid it does. I have done many experiments myself and batteries often charged with fastcharge in as little as 6 months give you no more than 70% of its original charge.
Enviado desde mi SM-N930F mediante Tapatalk
..the same goes for wireless charging btw.
Amplificator said:
..the same goes for wireless charging btw.
Click to expand...
Click to collapse
Are you joking? What is your answer based on?
Wireless charging runs on a much lower amperage so it should be the best solution to charge your phone.
nonyhaha said:
Are you joking? What is your answer based on?
Wireless charging runs on a much lower amperage so it should be the best solution to charge your phone.
Click to expand...
Click to collapse
My answer is based on simple physics.
Just because the amps are lower doesn't mean it's not bad for the battery.
Wireless charging is way less efficient than any form of wired charging.
What happens to the loss? Well, it gets dissipated as heat - and what is the "big killer" of lithium batteries? ..heat.
For this single fact alone, denying that wireless charging causes more harm than a cabled charging is simply.. well, silly.
The only ones denying this are either unaware of simple science or are lying to you, probably to sell you a charger
Yes, every form of charging, even at a theoretical 100% efficiency will heat up the battery due to chemical reactions inside the battery, but the lower efficiency you have the more energy is converted into heat - thus you do more damage and getting even less actual battery-energy out of it.
Simply put: the best charging method is the one that produces the least amount of heat while maintaining a high efficiency - wireless charging is simply not that.
Charging using a cable at 90% means 10% is being converted into heat (not all 10%, but for arguments sake, play along), where as using wireless charging might be at.. 50% depending on different circumstances (probably a lot closer to 70% than 50%, but again, for arguments sake).
This means that the other 50% is just turned into wasted, unnecessary and unwanted heat.
The percentages obviously aren't correct in this example, but it's more to get the point across.
With wireless charging you do more damage (it is subjective as to whether this matters to you) to the battery than you would by using a cable, simply because you create more excessive heat which only purpose is to heat up the battery and surrounding area than actually going into the battery itself.
If we consider the 50% efficiency of the before mentioned example, this means that you would need to charge your device for almost twice as long time as when you use a cable. Not only does it create more heat by virtue of being inductive charging, but it will be doing so for, again, almost twice the time length.
Efficiency also depends on things like distance - the less "perfect" your phone is placed on the charger the less efficient, and thus more wasteful it is.
Google something like "qi wireless charging overheating" and you will see plenty of people reporting on overheating problems when using wireless charging. This is because of all this wasted energy that is dissipated as heat - instead of "filling" the battery it simply heats it, and the surroundings, up.
Despite being made to the same specs, this seem to differ from charger to charger, such as this thread here on XDA would indicate: http://forum.xda-developers.com/google-nexus-5/help/post-qi-charging-battery-temp-t2544768
If you look at the version specifications you see that version 1.2 of the "low power" Qi charging branch which phones are a part of increased the power to up to 15W.
Unless they also worked on the efficiency this would actually mean that version 1.2 does more damage to the battery than 1.0 and 1.1, but for that you would have to dive a bit deeper than the information given in that link.
But as always it's sort of subjective as to what point people will see wireless charging as being too wasteful and/or damaging.
Personally, I don't care because the convenience of wireless charging by far outways the little damage it does to a battery, in my opinion, and the same goes for QuickCharge as well. By the time I would see a noticeable effect on battery life I have probably already bought a new phone anyway
If we take Qualcomms QuickCharge for example,I think QC 3.0 is at the point of where people shouldn't really care about the negative impact. If you read the spec sheet for QC 3.0 it's basically a tweaked version of QC 2.0 (well duh) where the power delivery is controlled much better than QC 2.0 was, bringing both the efficiency and therefor speed to a much higher level even though both are rated for 18W.
Some reading for those who still doubt basic physics :
http://batteryuniversity.com/learn/article/charging_without_wires
http://batteryuniversity.com/learn/article/charging_at_high_and_low_temperatures
http://batteryuniversity.com/learn/article/all_about_chargers
http://batteryuniversity.com/learn/article/ultra_fast_chargers
..and the best of all: https://google.com/
But let me ask you the same question you asked me; and I quote:
nonyhaha said:
Are you joking? What is your answer based on?
Click to expand...
Click to collapse
..that probably sounded very condescending (which is not how it was intended, of course), but I'm curious as to where you've acquired this absurd idea that Qi wireless charging is the best method of all? It's very likely the worst of all, actually.
There is almost no heat dissipated for QC3.0
For me quick charging is a big help, saves hours, if you have a large QC battery or powerbank especially. Yotaphone battery charges especially quickly with QC charger.
"..Wireless charging is way less efficient than any form of wired charging..."
Yes, because you convert first AC 110v or 240v to a lover voltage, f.e DC 5v with an efficiency of maybe 85%.
Then this 5v DC are chopped to a long wave ac voltage (about 19v / 110 to205 kHz) and sends to a cooper coil in the QI transmitter.
There the energy goes as a by a resonant inductive couppling (magnetic field) through a air gap to the QI receiver - again wit an efficiency of perhaps 70%.
The magnetic induction in the receiver coil delivers us again long wave ac voltage which is converted into adequate DC voltage (again efficiency about 70%).
So frankly speaking you may tell a bit of truth regarding losses converted to heat - but this heat ocures everywhere, but not in the Li-Po batteries. It does only in the last step: conversion of electrical energy into a chemical process inside of Li-Po.
Take a look to a label on your QI Charger and you will notice something like following: Input 5V/2a, Output 5V/1A (loss of 50%)
Almost all lithium batteries have their own charging controllers on board which take care of the correct charging parameters. Those controllers are adjusted to charge and also quick charge li-po batteries in the right manner.
Enough theory.
Just follow the electrical way:
in case of direct charger: USB-connector ->copper wire -> Smartphone -> copper wire->LiPo
in case of QI charger: USB Connector->copper coil->air gap->copper coil->copper wire-> LiPo
so there's no basic difference how the LiPo is connected to the power - in both cases by a copper wire
in both cases you can charge with lets say 5v/1A (of course LiPo will be charged with their own characteristical voltage and currents)
modern LiPos are built for a life of 700 bis 1000 charging cycles (about 2 years), and nobody knows if a LiPo would live longer by charging him slowly.
You can charge your smartphone in a fridge to prevent high temperatures.
USB devices are smart, they negotiate themselves by a protocol regarding the charge load. There is no danger to take a Smartphone with capability to be charged with 1.4 amps and connect it to a charger with a 2.1 amp.
You should take more care of the USB cable - it should be able to pass those required Amps to the devices.
Yes less efficient and worse for battery, maybe takes a few minutes more to charge, costs a little more to charge. But its much more pleasing not to use cables and very impressive too. I love wireless charging.
Amplificator said:
My answer is based on simple physics.
Just because the amps are lower doesn't mean it's not bad for the battery.
Wireless charging is way less efficient than any form of wired charging.
What happens to the loss? Well, it gets dissipated as heat - and what is the "big killer" of lithium batteries? ..heat.
For this single fact alone, denying that wireless charging causes more harm than a cabled charging is simply.. well, silly.
The only ones denying this are either unaware of simple science or are lying to you, probably to sell you a charger
Yes, every form of charging, even at a theoretical 100% efficiency will heat up the battery due to chemical reactions inside the battery, but the lower efficiency you have the more energy is converted into heat - thus you do more damage and getting even less actual battery-energy out of it.
Simply put: the best charging method is the one that produces the least amount of heat while maintaining a high efficiency - wireless charging is simply not that.
Charging using a cable at 90% means 10% is being converted into heat (not all 10%, but for arguments sake, play along), where as using wireless charging might be at.. 50% depending on different circumstances (probably a lot closer to 70% than 50%, but again, for arguments sake).
This means that the other 50% is just turned into wasted, unnecessary and unwanted heat.
The percentages obviously aren't correct in this example, but it's more to get the point across.
With wireless charging you do more damage (it is subjective as to whether this matters to you) to the battery than you would by using a cable, simply because you create more excessive heat which only purpose is to heat up the battery and surrounding area than actually going into the battery itself.
If we consider the 50% efficiency of the before mentioned example, this means that you would need to charge your device for almost twice as long time as when you use a cable. Not only does it create more heat by virtue of being inductive charging, but it will be doing so for, again, almost twice the time length.
Efficiency also depends on things like distance - the less "perfect" your phone is placed on the charger the less efficient, and thus more wasteful it is.
Google something like "qi wireless charging overheating" and you will see plenty of people reporting on overheating problems when using wireless charging. This is because of all this wasted energy that is dissipated as heat - instead of "filling" the battery it simply heats it, and the surroundings, up.
Despite being made to the same specs, this seem to differ from charger to charger, such as this thread here on XDA would indicate: http://forum.xda-developers.com/google-nexus-5/help/post-qi-charging-battery-temp-t2544768
If you look at the version specifications you see that version 1.2 of the "low power" Qi charging branch which phones are a part of increased the power to up to 15W.
Unless they also worked on the efficiency this would actually mean that version 1.2 does more damage to the battery than 1.0 and 1.1, but for that you would have to dive a bit deeper than the information given in that link.
But as always it's sort of subjective as to what point people will see wireless charging as being too wasteful and/or damaging.
Personally, I don't care because the convenience of wireless charging by far outways the little damage it does to a battery, in my opinion, and the same goes for QuickCharge as well. By the time I would see a noticeable effect on battery life I have probably already bought a new phone anyway
If we take Qualcomms QuickCharge for example,I think QC 3.0 is at the point of where people shouldn't really care about the negative impact. If you read the spec sheet for QC 3.0 it's basically a tweaked version of QC 2.0 (well duh) where the power delivery is controlled much better than QC 2.0 was, bringing both the efficiency and therefor speed to a much higher level even though both are rated for 18W.
Some reading for those who still doubt basic physics :
http://batteryuniversity.com/learn/article/charging_without_wires
http://batteryuniversity.com/learn/article/charging_at_high_and_low_temperatures
http://batteryuniversity.com/learn/article/all_about_chargers
http://batteryuniversity.com/learn/article/ultra_fast_chargers
..and the best of all: https://google.com/
But let me ask you the same question you asked me; and I quote:
..that probably sounded very condescending (which is not how it was intended, of course), but I'm curious as to where you've acquired this absurd idea that Qi wireless charging is the best method of all? It's very likely the worst of all, actually.
Click to expand...
Click to collapse
So you really think you know what you are saying there...
Heat dissipation will happen ONLY on the emitter part. So no heating on the recetor coil as well as no heating in the phone. I thinl ypu have to get your facts straight.
Because wireless charging coils run on such low amperage this will nevver become a problem of overheating.
As you said before me, you should get your phisics knowlege up to date. I am already a graduate with a phisics degree.
nonyhaha said:
So you really think you know what you are saying there...
Heat dissipation will happen ONLY on the emitter part. So no heating on the recetor coil as well as no heating in the phone. I thinl ypu have to get your facts straight.
Because wireless charging coils run on such low amperage this will nevver become a problem of overheating.
As you said before me, you should get your phisics knowlege up to date. I am already a graduate with a phisics degree.
Click to expand...
Click to collapse
Yes, I do think I know what I'm talking about - but luckily you came to the rescue and used your alleged physics degree to write a reply that proved me wrong with all of your facts, right?
Oh, no.. you didn't - you just doubled down instead, well done.
It doesn't matter (and is not important in this case) where the heat dissipation happens (and never did I claim it happened at the receiver - only that it happens) - the battery is still being heated up regardless, due to the energy loss.
If someone with an alleged physics degree keeps denying that the battery is heated up accordingly to my previous post then I doubt that you finished at the top of your class, if at all, sorry. I would really like to see all your evidence you have against what I wrote in my previous post (and that tons of people are posting about on the interwebz).
Just give it a go on Google, such as this thread from XDA: http://forum.xda-developers.com/google-nexus-5/help/post-qi-charging-battery-temp-t2544768
You can even do a simple charging test of your own, just compare battery temperatures while using a Qi wireless charger, QC2.0 and another at 1A.
Are everyone posting about high temperatures while using Qi chargers lying? Why would they do that? ..maybe the wired-charging-mafia are paying people to discredit WPC and other groups.. hm, maybe.
Yeah, it's getting a bit ridiculous, but silly claims require silly responses, sorry
If you can actually prove what I was saying in my previous post is wrong then I'll gladly accept it, but I do not take "na-ah, not true" with any degree of seriousness and neither do I give credit to claims of physics degrees. In that case I'm an ESA astronaut currently in space - see where this is going?
I go by what you actually write, not what you claim. The only reason for boasting about alleged degrees is to divert attention from the lack of any credible proof - disprove what my previous post said and I'll gladly accept it.
Ok, so my Yotaphone 2 charger has quick charge ability, as does my Samsung Galaxy Note 4 charger and car charger.
Despite all of these chargers having fast charging ability and my Samsung Note 4 fast charging perfectly with all of them, none of them appear to fast charge my Yotaphone 2......
It's at 63% charged right now and whether I plug it into a non QC charger or any of my quick chargers, it's saying 55 minutes until fully charged.
I've looked through the settings pages and can't find a way to enable quick charge on my Yotaphone like I could on my Note 4 battery page.
I'm running a Gearbest supplied YD206 which I flashed to the RU 134 ROM (so it's now showing as a YD201)
Am I missing something?
Any ideas/replies would be greatly appreciated!
Yotaphone 2 charger should indicate active quick charging by ligthing up "Yotaphone" with white LEDs on the charger. If its charging with 5V only your charger doesn't light up.
I don't think that theres something wrong with your phone. Just that charging estimation is inaccurate (at the moment).
Well my chargers Yotaphone logo is lighting up, so I guess it's working then. Thanks for the reply ?
I've had to put the two pin Yotaphone charger block into a three pin UK adaptor to try it. Annoyingly & worryingly it buzzes a lot & quite loudly - is that the same for everyone?
zippyioa said:
Ok, so my Yotaphone 2 charger has quick charge ability, as does my Samsung Galaxy Note 4 charger and car charger.
Despite all of these chargers having fast charging ability and my Samsung Note 4 fast charging perfectly with all of them, none of them appear to fast charge my Yotaphone 2......
It's at 63% charged right now and whether I plug it into a non QC charger or any of my quick chargers, it's saying 55 minutes until fully charged.
I've looked through the settings pages and can't find a way to enable quick charge on my Yotaphone like I could on my Note 4 battery page.
I'm running a Gearbest supplied YD206 which I flashed to the RU 134 ROM (so it's now showing as a YD201)
Am I missing something?
Any ideas/replies would be greatly appreciated!
Click to expand...
Click to collapse
Perhaps something wrong is with the cable, not the charger. Something like that happened to me sometime ago - when I used some different cable QC works again.
I had already tried three different chargers and two different cables
If the earlier post about the Yotaphone charger lighting up is correct, I think the phone is quick charging ok.
I guess I was expecting something similar to my Note 4 where it actually stated "fast charging" in the battery menu if I was charging it with a QC.
That message would then change to "charging" if I used a standard charger instead.
I bought a new powerbank, it seems to charge other phones ok but NOT the yotaphone. The powerbank displays the percentage charge for about 10 seconds then display goes off, but so does the yotaphone charging. Other phones and gadgets don't go off. Anyone else have this?
Powerbank is QC3.0. I have tried using different cables, always same.
Sometimes it charges OK. I thought my powerbank was fake until I found it charged other gadgets well.
I also noticed that YotaPhone2 sometimes doesn't want to charge. I just plug it in (cable&charger original), the YotaPhone logo lights up but the phone just doesn't charge! I will try with my power bank and see what happens.
I haven't understood the cause yet, maybe it's because mine has unlocked bootloader, TWRP, root, xposed. (YD206)
Hello, after sending my s7 edge to warranty for terrible battery (2h Sot at the top after a clean install), i´m questioning if could be the use of wireless charging every night the cause of so fast battery degradation.
In battery health concerned, there is a difference using the wireless charger instead of normal cable charger?
And btw, a good Samsung wireless charger is better than a ordinary one?
I would also like information on this. I have used only wireless charging non samsung charger fast charging disabled in settings. My phone is almost a year old and it out still working well. Just curious about best practice for battery health longevity.
spankmatic22 said:
I would also like information on this. I have used only wireless charging non samsung charger fast charging disabled in settings. My phone is almost a year old and it out still working well. Just curious about best practice for battery health longevity.
Click to expand...
Click to collapse
Yes, I'm also have quick charge disabled.
So, what kind of wireless charging? Regular QI, or the newer Fast Wireless chargers? The answer depends on that.
Batteries don't like heat. Batteries heat up when they are charged and discharged because of internal resistance. All those electrons flowing through the battery generate heat. The question is how much is too much.
Rapid charging (like QC 2.0 or 3.0) puts more power into the battery than normal slow charging. More power means more heat. And the closer to full charge the battery is, the more heat is generated. That's why all the rapid charge systems reduce the charging voltage and current as the battery "fills up."
Does wireless charging heat up the battery? For regular "slow" wireless charging, the answer is maybe, maybe not, but probably not enough to notice in any case. There are two things going on with wireless charging. The first is the wireless coils in the charger and phone, the second is the amount of power flowing into the battery. When charging, the coils generate heat. With a well designed phone and charger not a lot, but some. IF the coil gets hot enough, and is close enough to the battery, to heat up the battery, then it could have an effect on battery life. But the output of the wireless coil to the battery is not that great, so the battery won't heat up from the charging itself. Using a standard wireless charger on my Edge, the phone barely gets warm, so I'm not worried about damaging the battery.
With a rapid wireless charger, though, the answer may be different. Samsung's rapid wireless charger puts out enough heat that Samsung put a fan in it. How much of that heat reaches the battery I don't know. But since it's a rapid charger, it's pushing more power into the battery, which WILL make it hotter than a slow charger. So just like a wired rapid charger, it probably does have some impact on battery life
tl;dr version: If you're using a standard (not rapid) wireless charger, don't worry about it. If you're using any kind of rapid charger, only use the rapid charge mode when you really need to.
meyerweb said:
So, what kind of wireless charging? Regular QI, or the newer Fast Wireless chargers? The answer depends on that.
Batteries don't like heat. Batteries heat up when they are charged and discharged because of internal resistance. All those electrons flowing through the battery generate heat. The question is how much is too much.
Rapid charging (like QC 2.0 or 3.0) puts more power into the battery than normal slow charging. More power means more heat. And the closer to full charge the battery is, the more heat is generated. That's why all the rapid charge systems reduce the charging voltage and current as the battery "fills up."
Does wireless charging heat up the battery? For regular "slow" wireless charging, the answer is maybe, maybe not, but probably not enough to notice in any case. There are two things going on with wireless charging. The first is the wireless coils in the charger and phone, the second is the amount of power flowing into the battery. When charging, the coils generate heat. With a well designed phone and charger not a lot, but some. IF the coil gets hot enough, and is close enough to the battery, to heat up the battery, then it could have an effect on battery life. But the output of the wireless coil to the battery is not that great, so the battery won't heat up from the charging itself. Using a standard wireless charger on my Edge, the phone barely gets warm, so I'm not worried about damaging the battery.
With a rapid wireless charger, though, the answer may be different. Samsung's rapid wireless charger puts out enough heat that Samsung put a fan in it. How much of that heat reaches the battery I don't know. But since it's a rapid charger, it's pushing more power into the battery, which WILL make it hotter than a slow charger. So just like a wired rapid charger, it probably does have some impact on battery life
tl;dr version: If you're using a standard (not rapid) wireless charger, don't worry about it. If you're using any kind of rapid charger, only use the rapid charge mode when you really need to.
Click to expand...
Click to collapse
That's my opinion too.
The fact is that I'm using a regular/slow wireless charger and my S7 Edge barely gets warm at charging. But even so, my battery must have a problem ( I'm waiting for Samsung report). If it proves that wireless charging it's worse for battery (and it's just one year old), I'll switch to the good old usb cable.
You could test it out for yourself with my app
https://forum.xda-developers.com/android/apps-games/charge-monitor-t3555496
Vogal said:
Hello, after sending my s7 edge to warranty for terrible battery (2h Sot at the top after a clean install), i´m questioning if could be the use of wireless charging every night the cause of so fast battery degradation.
In battery health concerned, there is a difference using the wireless charger instead of normal cable charger?
And btw, a good Samsung wireless charger is better than a ordinary one?
Click to expand...
Click to collapse
I recommend to read this
:good:
They replaced my battery, now its much better.
For now, I'll try using only the provided charger and cable.