Database Users

Yet Another Battery Tip

Well... I completely stopped charging my phone with the wall charger and I am now just using either my car charger or USB and i've noticed my phone over the last two days has probably doubled in being able to hold a charge. Today I made approximately 2 or 3 30 minute - 1 hour calls, used the internet approximately 20 times for about 5 minutes each time and used SNESnoid for approximately 1 hour straight and my battery was at 40% after a 10 hour work day, not too shabby. Not to mention I also don't get that annoying 10% drop within 10 minutes of unplugging the phone anymore
I've seen a ton of other battery tip's but I've yet to see any actually say stop using a wall charger all together. Here's to hoping this helps someone

Lol thanks for the tip. I highly doubt this is anymore then a placebo but good luck to whoever tries it. Not calling you OP I am just finding it hard to believe.
Furthermore, have you tried reseting your battery stats. I mean the initial 100-90 percent drop you are calling to quick sounds like its the fault of bad battery stats. If you need a link to how to reset your battery PM me only because I might not check back to this post lol.

DirtyShroomz said:
Well... I completely stopped charging my phone with the wall charger and I am now just using either my car charger or USB and i've noticed my phone over the last two days has probably doubled in being able to hold a charge. Today I made approximately 2 or 3 30 minute - 1 hour calls, used the internet approximately 20 times for about 5 minutes each time and used SNESnoid for approximately 1 hour straight and my battery was at 40% after a 10 hour work day, not too shabby. Not to mention I also don't get that annoying 10% drop within 10 minutes of unplugging the phone anymore
I've seen a ton of other battery tip's but I've yet to see any actually say stop using a wall charger all together. Here's to hoping this helps someone
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Click to collapse
Hmmm... I don't think that USB/Wall would actually make a overall difference in battery life but it could be that it doesn't "idle the charging" when you hit close to a full charge. So you're probably just getting the extra 5-10% that you mentioned.

twilk73 said:
Lol thanks for the tip. I highly doubt this is anymore then a placebo but good luck to whoever tries it. Not calling you OP I am just finding it hard to believe.
Furthermore, have you tried reseting your battery stats. I mean the initial 100-90 percent drop you are calling to quick sounds like its the fault of bad battery stats. If you need a link to how to reset your battery PM me only because I might not check back to this post lol.
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Click to collapse
Ehh... I don't make BS threads, never have and those that know me from the Hero forums can vouch. Just posting my findings

Award Tour said:
Hmmm... I don't think that USB/Wall would actually make a overall difference in battery life but it could be that it doesn't "idle the charging" when you hit close to a full charge. So you're probably just getting the extra 5-10% that you mentioned.
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Click to collapse
I know for a fact im getting the initial 10% but I looked at my battery today at 12:40 tonight before leaving work thinking "ahh crap I haven't charged it it's got to be at, at least 5-15% and nope, it was exactly 39%, I was amazed. Talked to a girl for about 40 minutes on my drive home, talked to another friend for 5 and battery dropped to 35%

I've noticed this as well. Days that I've only used my moto car charger, the battery (even the cheap ebay ones) seem to hold the charge better, which I thought was strange, because you would think it would be a worse -maybe equal- change.

Charges more slowly and fills up more?

oOflyeyesOo said:
Charges more slowly and fills up more?
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Click to collapse
That's my theory

This is the case with most batteries, and I thought it was common knowledge with Li-ion. The lower the current you charge with, the better the charge.
Using the higher amperage wall charger lets you hit the voltage peak quicker but, the topping charge will take longer. A lot of car chargers are just as high amperage as wall chargers.
Other things you can do to try maintain the capacity of the battery over the course of its life:
-NEVER let it get hot (whether from heavy usage or keeping it in a hot car or the sun)
-never deep cycle (totally kill the battery)
-try to keep it between 40 - 60% charge for most of its life (Li-ion batteries do not like being at full charge or no charge)
Doing any of these things once will not destroy the battery, but by the 500th charge cycle, you can bet your ass it will.
http://batteryuniversity.com/partone-12.htm

DirtyShroomz said:
2 or 3 30 minute - 1 hour calls
internet 20 times
SNESnoid
...
work day
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Click to collapse
Sounds like my kind of job! Seriously, I use USB (through a laptop) and car chargers almost exclusively and I have no real complaints about battery life. And by that I mean it gets me through the day, which is all I've come to expect from phones for the past few years. But I did happen to use a wall charger last night, and I have JuicePlotter active, so I did some checking.
Comparing my last overnight charge using my laptop's USB to last night's charge through a wall adapter, I found that the charging was actually faster through the laptop. I see that the charge tends to drop off as it approaches 100%, so I took pairs of points from uniform sections of each plot for my comparison:
Laptop USB:
44% to 82% in 41 minutes = 0.927% / min
Wall:
63% to 91% in 37 minutes = 0.757% / min

kzibart said:
Sounds like my kind of job! Seriously, I use USB (through a laptop) and car chargers almost exclusively and I have no real complaints about battery life. And by that I mean it gets me through the day, which is all I've come to expect from phones for the past few years. But I did happen to use a wall charger last night, and I have JuicePlotter active, so I did some checking.
Comparing my last overnight charge using my laptop's USB to last night's charge through a wall adapter, I found that the charging was actually faster through the laptop. I see that the charge tends to drop off as it approaches 100%, so I took pairs of points from uniform sections of each plot for my comparison:
Laptop USB:
44% to 82% in 41 minutes = 0.927% / min
Wall:
63% to 91% in 37 minutes = 0.757% / min
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Click to collapse
Hah, yeah my job is pretty amazing sometimes but I have def quit using the wall charger (unless I absolutely have nothing else around)
As far as for droiddev... this is my first phone where charging it from different devices gives me different results. I don't see where it would be common sense, Li-ion batteries are not supposed to not have these memory leak/hold issues like past batteries. A charge is a charge to li-ion batteries, but not in this case.

DirtyShroomz said:
As far as for droiddev... this is my first phone where charging it from different devices gives me different results. I don't see where it would be common sense, Li-ion batteries are not supposed to not have these memory leak/hold issues like past batteries. A charge is a charge to li-ion batteries, but not in this case.
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Not sure what you mean, but you will get the most life out of your battery by charging it short spurts at a time over USB. Read the article I linked to and you will see what I mean, but you can get the best charge into your battery by slowly ramping up in steps with a low current charger.

[Q] Nexus 4 Charge time

Hello Experts,
I received a new nexus 4 and noticed that it takes around 3.5 to 4 hrs for complete charging from 5% to 100%.... is it normal? my other sony xperia seems to be charge in about 1..5 hr
since i am new to Nexus 4, not sure what is the avg charge time and should i call for RMA? Please let me know what is the avg time for charging.
thx
Ganu

Perfectly normal. You want a nice slow steady charge, especially in a sealed phone. The battery needs to last as long as possible. Fast charging batteries significantly reduces their lifespan. My old Nexus S takes the same amount of time to charge from 5%.. 3-4hrs or so give or take.. I still have the two year old original battery and it holds a charge just as well as it did the day I bought it. Meanwhile my 15 minute charge AA batteries I bought last year lose their charge in a week just sitting on the desk.

Mine is just about the same, but that's under use. If I don't touch the phone, it typically charges to 100% in about an hour.
And if it's through USB.. um.. more like 8 hours to fully charge.

Battery widget reborn (awesome app btw) says my phone usually charges in about 2.5 hours. This is on Qi though not sure about the regular wall charger.

2-2.5 hours for me on usb wall charger and Qi Orb.

midnightmach said:
Battery widget reborn (awesome app btw) says my phone usually charges in about 2.5 hours. This is on Qi though not sure about the regular wall charger.
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Click to collapse
I concur.
Sent by carrier pigeon

From 2 hr 45 min (from around 12-15% juice left), my charge time has reached to 3 hr 30 mins now (i.e. from 1% juice left)... 14% juice wouldn't make such a huge difference so don't really know why it increased..

filthykid said:
From 2 hr 45 min (from around 12-15% juice left), my charge time has reached to 3 hr 30 mins now (i.e. from 1% juice left)... 14% juice wouldn't make such a huge difference so don't really know why it increased..
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Click to collapse
yes, this is one of the reasons i started this thread to understand what everyone is experiencing.... i called up the google customer support and they are ready to send in a RMA as it appears to be a higher side...
so let me know your thoughts guys...should 3.5 hrs charge time considered high and warrant a RMA? share your thoughts.

^ Hmmm.. I doubt if this would mean anything serious or worth RMA-ing. I can but I won't RMA my device because it's been exceptional so far. I am fairly happy with it and wouldn't want to get it replaced with a defected one.

Its perfectly normal especially from around 5% to 100%.. In my experience if you dont let it get below 20% it usually charges faster. I wouldnt RMA it especially if your phone is perfectly fine in other aspects.

I tried with a different charger yesterday and it took similar time. The charger has same voltage input levels.

You charge 3 hours, for only double the lifetime. How pathetic, actually. I didn't thought that the battery life would be that bad. I can hardly make trough 1 day, if I play some games, make some calls, and use a little bit of internet. On the last charge I got 4Hours of screen on time with 15% left.
Gosh, at least it's fun to use it. :/

[INFO] Maintain Long-term Battery HEALTH

This is a topic that I don't think has been covered here yet, but is very important. Especially because we cannot replace our batteries.
I'm interested in finding out the best way to prolong the life of our batteries. In other words, I want it to continue holding a charge as close to specs as possible.
I am NOT talking about extending the use we get out of one full charge.
Upon googling, I found these two useful articles:
http://lifehacker.com/5875162
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
From reading those, this is what I gather:
We should not leave our devices plugged in at 100%
Best practice would be to use phone until 50% then charge
Charging to 100% actually causes the battery stress. Charging to 90% or so is better.
I think these few facts are right, since my Thinkpad has a function that stops charging at 90% and doesnt start charging again until below 60% (or whatever values you choose).
What I'm not sure about, is what has HTC done to help prolong battery health?
Does our phone automatically switch to using power straight from the charger at 100% instead of charging and draining the battery simultaneously?
Does any phone do that?
Battery health is likely the reason why our phones charge so slowly. Slow charging = less stress = better battery health.
I've also emailed HTC to see if they have any tips. Their manual contain no tips.
UPDATE:
Okay, so HTC got back to me.. amazingly quick. lol
Its a long email, which I wont paste here, but the one important part is this:
It is better to unplugged your phone from the wall once the battery reach 100% and once the battery indicates that the battery percentage is about 15% you should plug the phone to the wall charger.
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Click to collapse
That is what the guy said, word for word. The rest of the email diverges and talks about general battery saving tips.
So what the HTC rep says seems to fall in line with the three points I got from the articles I read.
Only difference being HTC recommends going all the way down to 15% before charging.. Hmm

Honestly, considering most of us get a new phone after a year or so, we're not going to see any huge hits in battery performance even if we don't follow these "rules". Not to mention I'm REALLY not going to wake up in the middle of the night to unplug my phone just so it doesn't stay at 100% all night. Just charge the battery in whatever way's the most convenient.

Useful post thanks for sharing.
Sent from my Nexus 7 using xda app-developers app

jason27131 said:
Honestly, considering most of us get a new phone after a year or so, we're not going to see any huge hits in battery performance even if we don't follow these "rules". Not to mention I'm REALLY not going to wake up in the middle of the night to unplug my phone just so it doesn't stay at 100% all night. Just charge the battery in whatever way's the most convenient.
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Click to collapse
You might be right. But I bet there are a few people out there who are on 2-year contracts or just don't think they'll give up their HTC One so easily.
I personally love the design of the device and want it to last as long as possible.
I haven't felt this way about a phone since my Xperia X1, which I did eventually give up because I already replaced the housing twice, the mainboard was starting to have issues, and Windows Mobile 6 was just **** lol.
Anyway, under normal use these batteries should be fine for a bit. But unintentional abuse can wear them down faster than you think. At least thats what I get from these articles. And thats been my experience in the past with laptops and cellphones.
I too probably wont be waking up at night to unplug my phone or buying a timer to automatically stop charging my phone. But when I can adhere to these guidelines, I'll try my best to.
------
jonny68, no problem, glad this is useful.

These batteries have electronics to protect them, you wont be doing the battery any damage how you use it other than using your phone a lot and putting a lot of cycles through it. They never let you drain your battery 100% and they never let your charge 100%, it just shows 0-100% for the ease of the consumer. You cannot over charge your phone, if you could there would be a lot of issues out there.
Fact is just use your phone how you use it.

Terrorantula said:
These batteries have electronics to protect them, you wont be doing the battery any damage how you use it other than using your phone a lot and putting a lot of cycles through it. They never let you drain your battery 100% and they never let your charge 100%, it just shows 0-100% for the ease of the consumer. You cannot over charge your phone, if you could there would be a lot of issues out there.
Fact is just use your phone how you use it.
Click to expand...
Click to collapse
But that isnt entirely true.
Yes, our batteries now have mechanisms to stop overcharge and deep discharge.
But these same mechanisms do not provide longevity. Instead, our batteries are geared more towards providing the most use per charge without damage.
It is done this way for obvious reasons. It also means we have a choice about whether or not we want to sacrifice a small bit of convenience or capacity now, for a better battery later in time.
For example, this chart from the second article I linked shows that if you charge only to 90%, your battery can go through double the charge/discharge cycles before dropping to 70% health as compared to charging all the way to 100%

Quote from the article:
"Should I disconnect my laptop from the power grid when not in use?” many ask. Under normal circumstances this should not be necessary because once the lithium-ion battery is full the charger discontinues charge and only engages when the battery voltage drops. Most users do not remove the AC power and I like to believe that this practice is safe.
Like i said, this is all pointless, because 100% of us charge our phones overnight, and 0% of us are willing to wake up 3 hours into our sleep to unplug it at 90% or 100%.

jason27131 said:
Those talks about voltages, not charge level btw.
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Click to collapse
http://en.wikipedia.org/wiki/State_of_charge
Reading voltages is one of many methods of determining how much charge is left within a battery. Hence the other column in that table.
You cant just stick a meter on a battery and read how many mAHs are left.
EDIT:
jason27131 said:
Quote from the article:
"Should I disconnect my laptop from the power grid when not in use?” many ask. Under normal circumstances this should not be necessary because once the lithium-ion battery is full the charger discontinues charge and only engages when the battery voltage drops. Most users do not remove the AC power and I like to believe that this practice is safe.
Like i said, this is all pointless, because 100% of us charge our phones overnight, and 0% of us are willing to wake up 3 hours into our sleep to unplug it at 90% or 100%.
Click to expand...
Click to collapse
Right, and that is true for some laptops as some of them do tend to have more sophisticated battery management software/hardware. I mentioned my own Thinkpad and its functions in this OP.
I was curious as to if our phones do the same thing as laptops; disengage the battery at 100% charge and run off AC only. But it does not, as per HTC's reply suggesting phones should be unplugged once at 100%.
And for your other point, I already addressed that. I'm not saying this is essential or that everyone should follow these guidelines. But to some people this does matter, and this post is for them.
As for myself, I'll use yesterday as an example.
I got home from work at around 6:30PM, my phone was down to 30-40%, so I plugged it in.
Before I went to bed, the phone had hit 93%, so I unplugged it and left it there with wifi on.
I wake up, its lost like 3-5%, no big deal.
Around lunch time its dropped to 30% at work, so I plugged it in.
It reached 89% a few minutes ago, so I unplugged it.
So when its convenient for me to do so, I follow these guidelines. If I know I have a long day ahead with no access to a charger, or if I need to charge overnight, then so be it, I'll let it sit at 100% until I have to leave.

Technically speaking this is all correct and a guideline to try to follow. That's all. If it's impossible to do, the phone will be okay. That being said, I am of the belief that if there is a better way to do something, we should at least try to do that. I for one love this device and may never sell it. This is one of those iconic builds that I wonder how much more of its class we will see. Even right now as the music pours out of these front speakers, my love for it grows.
I just wanted to add my 2 cents. And this little tidbit:
Every 100mv less than full charge you apply, will double the lifespan of the battery. So, a rough approximation,
Charge the phone to 100% (4.3v) , discharge to about 15% You'll get roughly 250-500 cycles.
Charge to 90% (4.2v) down to 15, you'll get 500-1000 cycles.
80% (4.1) 1000-2000 cycles.
Cycle count will increase by avoiding deeper discharges...
In a perfect world, you could potentially get 2000-3000 cycles by
1. Charging to 80% or ~ 4.1v
2. Avoiding discharge below 30% or ~ 3.6v
3. Avoid extreme temperature changes and prolonged exposure to temperatures above 45c
Most of this comes from personal experience and much research. Check out battery university if you get some time.
Sent from my HTC One using xda app-developers app

By last do you mean until the battery reaches 70% maximum capacity? Honestly, at 1000 cycles, thats already good enough since thats 3 years worth of charging at roughly 1 cycle a day. I doubt I will keep this phone past 2 years.

m0nz said:
Technically speaking this is all correct and a guideline to try to follow. That's all. If it's impossible to do, the phone will be okay. That being said, I am of the belief that if there is a better way to do something, we should at least try to do that. I for one love this device and may never sell it. This is one of those iconic builds that I wonder how much more of its class we will see. Even right now as the music pours out of these front speakers, my love for it grows.
Click to expand...
Click to collapse
That's exactly how I feel, and the reason why I started the thread :victory:
Your figures fall close to the ones in the articles, so it sounds bout right.
Im curious though, does unplugging/replugging have any effect on the charge/discharge cycle?
For example, if i'm charging my phone but i need it for something, I unplug it, use it, and plug it back in.
That shouldn't have any effect am I right?

You have to define what you mean when you talk about how long a battery "lasts".
We're specifically talking about deterioration in capacity over time.
The battery will "last" for 100,000 cycles in the sense that you will still be able to charge it and it will still be able to power a device on its own for a period of time. The question is how short does that period of time get before you say "this battery isn't useful anymore"
This came up in another thread and the threshold discussed there was 80% of original capacity. Apparently HTC rates the One's battery "lifetime" as 500-700 charge cycles until the battery capacity drops to 80% of its original level. (You also have to define charge cycle: charging from 0-100 or anything that adds up to that, such as charging from 40 to 90 on one day followed by charging from 40 to 90 on another day - counts as one "cycle".)
So this battery could "last" - in the sense that it will still have 80% of its useful capacity - for 3000 cycles if you follow some of the more conservative approaches above.

I don't know how typical my behavior is, my last three phones were bought via two year contracts, each phone was replaced after about one year, when the next-generation model appealed to me.
Don't imagine too many buyers of "flagship" devices keep their phone for over two years.
Sent from my HTC One using xda app-developers app

NxNW said:
You have to define what you mean when you talk about how long a battery "lasts".
We're specifically talking about deterioration in capacity over time.
The battery will "last" for 100,000 cycles in the sense that you will still be able to charge it and it will still be able to power a device on its own for a period of time. The question is how short does that period of time get before you say "this battery isn't useful anymore"
This came up in another thread and the threshold discussed there was 80% of original capacity. Apparently HTC rates the One's battery "lifetime" as 500-700 charge cycles until the battery capacity drops to 80% of its original level. (You also have to define charge cycle: charging from 0-100 or anything that adds up to that, such as charging from 40 to 90 on one day followed by charging from 40 to 90 on another day - counts as one "cycle".)
So this battery could "last" - in the sense that it will still have 80% of its useful capacity - for 3000 cycles if you follow some of the more conservative approaches above.
Click to expand...
Click to collapse
Hm, yea I should update my OP with that info. The articles I referenced seem to define a battery's lifetime as the number of cycles it can go through before hitting 70% of original max capacity.
paul_59 said:
I don't know how typical my behavior is, my last three phones were bought via two year contracts, each phone was replaced after about one year, when the next-generation model appealed to me.
Don't imagine too many buyers of "flagship" devices keep their phone for over two years.
Sent from my HTC One using xda app-developers app
Click to expand...
Click to collapse
Not sure, but in the past I've always seemed to kill my phone's batteries before I replaced the phone itself lol.
If I look back now, that was probably because I always drained to 0% and let my phone stay plugged in at 100%. So basically I was always doing the worst thing possible, short of literally cooking my battery >.>

Nippero said:
Hm, yea I should update my OP with that info. The articles I referenced seem to define a battery's lifetime as the number of cycles it can go through before hitting 70% of original max capacity.
Not sure, but in the past I've always seemed to kill my phone's batteries before I replaced the phone itself lol.
If I look back now, that was probably because I always drained to 0% and let my phone stay plugged in at 100%. So basically I was always doing the worst thing possible, short of literally cooking my battery >.>
Click to expand...
Click to collapse
I really don't think that's it. I have done that with EVERY phone i've had, GS3, Nexus, etc. After a year i didn't see any major battery difference, and I plug it in at least once a day, sometimes 2 times.

jason27131 said:
I really don't think that's it. I have done that with EVERY phone i've had, GS3, Nexus, etc. After a year i didn't see any major battery difference, and I plug it in at least once a day, sometimes 2 times.
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Click to collapse
The difference may be how much we use our phones then, because with my last phones I typically used my phone quite frequently at work since many websites are blocked. Including open source code sites which actually help me with my job... stupid corporate proxy.
Anyway, I used to leave my G2 and Photon Q plugged in all day at work and at night. So thats 16hrs of being plugged in per day... Probably wasnt good for them.
But hey, if you're right and I'm wrong, I'll be even happier cause that means my battery will be fine no matter what I do lol.
However, battery deterioration isn't a myth, and it does happen. Only question is, how much does it happen.

Nippero said:
The difference may be how much we use our phones then, because with my last phones I typically used my phone quite frequently at work since many websites are blocked. Including open source code sites which actually help me with my job... stupid corporate proxy.
Anyway, I used to leave my G2 and Photon Q plugged in all day at work and at night. So thats 16hrs of being plugged in per day... Probably wasnt good for them.
But hey, if you're right and I'm wrong, I'll be even happier cause that means my battery will be fine no matter what I do lol.
However, battery deterioration isn't a myth, and it does happen. Only question is, how much does it happen.
Click to expand...
Click to collapse
Ya i tend to just leave it overnight for about 7 to 8 hours. Sometimes during the day i might plug it in for an hour or so to grab some juice on my s3, something i haven't had to do on my One which is awesome (get about 2 days worth). Battery deterioration definitely does happen, but hey, if I have enough juice at the end of a year to still last me a day, I'm happy

I'm always on a 2 yr contract, no need to really worry about this, but good info none the less.

dont worry op .. ill put my battery in the many " to be taken care off" list.
ill make sure its in the list.
somewhere

If the ONe is anything like the HoX, the charger stops charging at 100%, then lets it drop to 95% before restarting trickle charge. However, the 95% battery state isn't immediately shown on screen, so many people use their phone then see a whole 5% jump downwards almost immediately. I haven't paid much attention to the HO yet, so I can't comment

Fast Charging Issue

Yesterday I have my curiousity and uncheck the fast charging option on settings. I turn off my note 4 and start my charging. I started to charge at 18% and after an hour it go up to 23% which is annoying. I decided to turn on my device and tick the check box of fast charging option. I left my device for 2 hours but to my surprise it was only at 54%! (device off). I turn on again my device to check if the fast charging is activated and found out that it was checked. I left it again for 2 hours and still 72%. Anyone experienced this? Any advice? It will be so much appreciated. TIA.

Something was probably running in background. Restart your phone and try again.
Sent from my SM-N910T using XDA Free mobile app

Have you tried with other usb cable ?
Maybe your cable is the problem.
If after change cable still didn't work, bring your device and the adapter that come with to to service center to check where the problem is

Did you use original charger and original cable?

I don't think fast charge works with the phone off...

rexxar31 said:
Yesterday I have my curiousity and uncheck the fast charging option on settings. I turn off my note 4 and start my charging. I started to charge at 18% and after an hour it go up to 23% which is annoying. I decided to turn on my device and tick the check box of fast charging option. I left my device for 2 hours but to my surprise it was only at 54%! (device off). I turn on again my device to check if the fast charging is activated and found out that it was checked. I left it again for 2 hours and still 72%. Anyone experienced this? Any advice? It will be so much appreciated. TIA.
Click to expand...
Click to collapse
Make sure you are using the original charger and cable from Samsung. Otherwise it could be the chargers problem as it doesn't provide enough voltage.

I had this same issue.i have changed cable ,even charger. You can only replace battery.Today 100% in 1h 28min before 100% in about 3.5h

pedmond said:
I don't think fast charge works with the phone off...
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Click to collapse
This would make sense, right?
I usually get to 50% in 30 minutes and 100% in 90 minutes with the phone on.
Sent from my SM-N9100

i never face this issue at all

I get 100 charge at 2 hours is it normal?

Send from my note 4

Hey hi I am from India and I had same issues. ..I went to service centre and found out that it was adapter issue. .since I am in warranty they replaced it and it works like charm. .no issues

fast charging wont active if your device is off. it's a application so you need to turn ON ur phone to active the fast charging. tried it already. it takes 8hrs to full charge [ off device ]

Iyrah said:
I get 100 charge at 2 hours is it normal?
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Click to collapse
That is not normal if you are using the original Samsung charger and cable? Did you turn fast charging on with Power Saving Mode? But sometimes the plugging source might not be able to provide enough voltage. I got 50% for 30 minutes and 100% for 60 minutes.

cwk8412 said:
I got 50% for 30 minutes and 100% for 60 minutes.
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Click to collapse
No, you did not. See post #17 below.
---------- Post added at 09:48 AM ---------- Previous post was at 09:47 AM ----------
jebjebs said:
it takes 8hrs to full charge [ off device ]
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No, it does not. In "normal mode", our power supply provides about 2 A of charging current. Taken losses by generated heat and less current needed for charging the last few percents into account, it takes about 2 hours or a little more for a full charge while the Note 4 is switched off. NOT 8 hours.
8 hours is a realistic value if you use a low power current source, like a standard USB port providing 500 mA of current.
500 x 8 = 4000 mAh; and that's quite exactly the amount you need to push into the battery to achieve a 100 % charge.
So your 8 hours refer to charging with a low power device like a standard USB port, but not to charging using the original power supply AND (!) the original cable. Yes, the cable DOES make a difference.
---------- Post added at 09:49 AM ---------- Previous post was at 09:48 AM ----------
Iyrah said:
I get 100 charge at 2 hours is it normal?
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Click to collapse
Yes, it is.

Chefproll said:
No, you did not.
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No, it does not.
---------- Post added at 09:49 AM ---------- Previous post was at 09:48 AM ----------
Yes, it is.
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Im pretty sure I did

cwk8412 said:
Im pretty sure I did
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You cannot.
It's physically impossible.
I got 50% for 30 minutes and 100% for 60 minutes.
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Not all energy goes into charging the battery; there's a good deal wasted for generating heat; that's why your Note gets a little warm while charging.
Fast charging provides a charging current UP TO about 3000 mA, that's the safety limit. Our battery has about 3220 mAh capacity.
The charger provides that current till the battery is "almost full", that's at about 92 %. ("About", because it's not the same every time, depends on several factors.)
After that, the current is lowered, so charging from e. g. 92 % to 100 % takes considerably more time.
So even if you get about 50 % in 30 minutes, a full charge to 100 % takes far more time than 60 minutes - because the "last mile" takes far more time than charging up to e. g. 92 %.
A continuous fast charge of 3000 mA up to 100 % will kill your battery.
As said, there's heat generated while charging. That heat does not fill the battery, so we need to deduct the energy wasted that way.
That's why it takes about 90 minutes for a full charge. Could take more time according to the battery drain of apps and processes running while charging. So fast charging times of 90 to 120 minutes or so are just plain normal.
And that's why it's simply impossible to charge the battery up to 100 % in 60 minutes.
I know it's tempting just to multiply the time taken for a 50 % charge by 2 - but that's not what's happening in reality.

cwk8412 said:
That is not normal if you are using the original Samsung charger and cable? Did you turn fast charging on with Power Saving Mode? But sometimes the plugging source might not be able to provide enough voltage. I got 50% for 30 minutes and 100% for 60 minutes.
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yup thats about right. [email protected]=12236mWh
30 min at 9V/1.8A= 8100mWh
30 min at 5V/2A=5000mWh
12236-(8100+5000)=full charge + 864mW of heat.
dont listen to chefprol - he knows nothing about electronics or batteries.

zurkx said:
yup thats about right. [email protected]=12236mWh
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Ah, my highly clever friend.
Obviously, you didn't learn from two painful and embarrassing confrontations. So get ready for the third.
30 min at 9V/1.8A= 8100mWh
30 min at 5V/2A=5000mWh
12236-(8100+5000)=full charge + 864mW of heat.
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In Germany, we have a special term for things like that; it's called a "Milchmädchenrechnung". Translation would read like "a naive calculation made by ignoring vital facts".
There's a lot of vital facts you ignored. Shall I start with you claiming that 14 hours is the best charging time ever? Or with you claiming that Lithium Ion batteries use "trickle charge" ?
See http://forum.xda-developers.com/note-4/help/note-4-question-charge-t2989546 for the full coverage; enjoy.
Now let's concentrate on the Milchmädchenrechnung above.
First have a look at this - I guess we can take Anandtech for quite serious: http://www.anandtech.com/show/8613/the-samsung-galaxy-note-4-review/3
Further down the page, under "Charge time", you'll find this statement about the Note 4: "... and most of the benefit would come from the first 50% or so of charging as power drops rapidly as the battery approaches full charge."
The red part is the part you didn't understand, leading to your Milchmädchenrechnung.
You took for granted that the power (amperage) doesn't drop at the end of the charging process; I guess you simply didn't know.
And that's the important factor making a full charge in just 60 minutes completely impossible.
Did you really believe Samsung would miss the chance of presenting a sensation like that in all media you can think of ? - That would have been the fastest charging mobile phone ever known. CNN would have broadcasted a special feature about that.
They did not, Samsung did not.
Reason: It's just nonsense.
dont listen to chefprol - he knows nothing about electronics or batteries.
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I guess I don't need to comment on that.

14 hours was the time i recommended a NEW phone be charged for the FIRST charge. i normally charge mine for about 7 hours with a single coil Qi charger. Because it takes around 7 hours (5 for a 3 coil depending on power input) for a Qi charger to go 0-100.
lithium ion batteries do use trickle charge. they top up the battery if the phone is above 90% at a slow charge rate. hence "trickle".
No i did take into account that power drops at the end of the charging process. thats what the extra 864mW is there for. Thats waste heat+headroom. maybe you can show YOUR calculations which are not so naive. oh wait, you cant. because a simple wall clock will tell you that the note 4 will quick charge in an hour in regular use.

45 Watt Wall Charger

Just got mine today. Tried to post a picture for you guys but it keeps telling me network error. Anyone else gets theirs?

Where did you get ti

Samsung's website is the only place to get it this month. After that Amazon will have it shipping end of October.

It's ridiculous to have to wait so long for a freaking charger...View attachment 4818828
Sent from my SM-N976V using Tapatalk

KruseLudsMobile said:
It's ridiculous to have to wait so long for a freaking charger...
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I ordered one on 8/27/19 and it's expected delivery date is 9/26/19.

I ordered mine from samsung back when I preordered the note 10+

Although they did say it wouldn't deliver until next month, then suddenly I got a notification from FedEx that it was coming a couple of days ago

I got mine yesterday, I strictly do wireless charging but it's nice to have it handy in case. I tested it out last night after I drained my battery. It takes pretty much the same time to charge to 100% but getting to 50% took under 30 minutes I believe.
Edit: 20 minutes not 30, but I've never tested the included 25w charger so I don't know how that compares.

That’s where it counts is the first half of charging to 100%. Thats where the 45 watts come into play. Doesn’t matter if you shave off time at the beginning or the end of the cycle, as long as you DO shave off some charge time.
I think the 45 W is still worth the cost. If you are in a pinch and youre battery is 10% and you need to top it off to get you through .. that faster current is going to earn its keep. This is what the charger is designed for...

chetly968 said:
I got mine yesterday, I strictly do wireless charging but it's nice to have it handy in case. I tested it out last night after I drained my battery. It takes pretty much the same time to charge to 100% but getting to 50% took under 30 minutes I believe.
Edit: 20 minutes not 30, but I've never tested the included 25w charger so I don't know how that compares.
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I've seen someone post the difference betweenvthe 25 and 45 is very minimal. Dont recalls exact numbers. Guess it depends if you really want to dish out 50 bucks. My 25 is pretty fast and not mention my SOT is 8hrs+ on average.

the 45 W will shine when the phone is near zero. when the battery is a lower capacity (near zero) the battery can accept a much larger current. as the battery recharges, the temp/capacity will slow down the charge.
so fir example, if the phone is at 60% already and you put it on the 45W, you won't see much faster speed over the sammy 25 when the phone is at 60%. this has been said to death but I know people don't read the forums often.
the charger is worth the price and its worth having in my daily use, as others. some people may not see a benefit in their environment and that's totally fine.
its just amazing the amount of posts people have made trying to put down the charger and refute what it can do..

There's already an existing thread discussing the 45W charger. Please continue the discussion there:
https://forum.xda-developers.com/galaxy-note-10+/accessories/45w-fast-charger-t3958631