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Is it just me or everyone else that is experiencing a super long time in charging their phone to full battery? I am running the froyostone latest build and I have already followed all the guides in this forum to save battery life. The issue I am having is that it takes many hours to recharge the battery to full when connected to a wall charger.
It took 5 hours to go from 30% battery to 90%.
*no i wasn't charging the phone with the phone turn off*
Zythyr said:
Is it just me or everyone else that is experiencing a super long time in charging their phone to full battery? I am running the froyostone latest build and I have already followed all the guides in this forum to save battery life. The issue I am having is that it takes many hours to recharge the battery to full when connected to a wall charger.
It took 5 hours to go from 30% battery to 90%.
*no i wasn't charging the phone with the phone turn off*
Click to expand...
Click to collapse
I have a stock battery, which I can charge from 25% or less to 100% in about 30 minutes to an hour. I think there is something wrong with your charger.
its actually not taking that long, it probably got to 90% VERY quickly, you just checked on it later... they're false numbers... what you need to do is this; run your battery all the way down.. then charge it for about 1-2hrs, until it gets somewhere in the 90's then, while plugged in, shut the phone down, remove the battery, put the battery back in, boot up the phone (the phone should remain plugged in) then load up WM, load up android with the hard buttons backlight on, then once it boots you should show higher than what you had before (if not 100%) from this point android will remember your charge and you will be able to go to 100% all the time now. (until you load a new rom)
10507 said:
I have a stock battery, which I can charge from 25% or less to 100% in about 30 minutes to an hour. I think there is something wrong with your charger.
Click to expand...
Click to collapse
I got stock battery also. No idea why it taking so long.
javolin13 said:
its actually not taking that long, it probably got to 90% VERY quickly, you just checked on it later... they're false numbers... what you need to do is this; run your battery all the way down.. then charge it for about 1-2hrs, until it gets somewhere in the 90's then, while plugged in, shut the phone down, remove the battery, put the battery back in, boot up the phone (the phone should remain plugged in) then load up WM, load up android with the hard buttons backlight on, then once it boots you should show higher than what you had before (if not 100%) from this point android will remember your charge and you will be able to go to 100% all the time now. (until you load a new rom)
Click to expand...
Click to collapse
I have already tried this but still no luck.
10507 said:
I have a stock battery, which I can charge from 25% or less to 100% in about 30 minutes to an hour. I think there is something wrong with your charger.
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Click to collapse
What kernel are you using?
Sichroteph said:
What kernel are you using?
Click to expand...
Click to collapse
I am using hastarin r8 kernel, but I was experiencing the same issue with previous versions and the default kernel.
I just tested the charging rate by connecting my HD2 to a stock charger from HTC which I borrowed from a friend. Charging was a lot faster.
Since I bought my HD2 used, the charger that came with it, is not the stock charger from HTC.
But I still don't understand what is causing the charging to be very slow.
How to calculate charging time
Charging time = capacity of battery x 1,4 / charging current
HD2 stock battery= 1230mAh x 1,4 / 1000mA = 1,7 hours
Best
leehobin
Two things on charging batteries:
1) First, make sure none of the pins in the battery compartment is bent. This dramatically slowed charging for me once.
2) Android keeps battery stats in a file that gets loaded with your build. THese stats are often wrong. Be sure to fully charge under WinMo, then with power still attached, boot into Android. This will adjust some of the stats and charging in Android should be fine then. There's a thread somewhere on more details here if you want to tweak your stats. The battery slows down its charging when it gets close to the full state. If for some reason your charger thinks the temperature is getting too high or the state is getting near full it dramatically slows the charging rate. Both of these could be erroneous interpretations of the battery data. Also, if you have an extended battery, make sure to use a Kernel that is compatible with extended batteries, like Hastarin 7.x.
Zythyr said:
I just tested the charging rate by connecting my HD2 to a stock charger from HTC which I borrowed from a friend. Charging was a lot faster.
Since I bought my HD2 used, the charger that came with it, is not the stock charger from HTC.
But I still don't understand what is causing the charging to be very slow.
Click to expand...
Click to collapse
Not all chargers are built the same. Some usb charger provide more juice while others provide less. Maybe your non stock charger came from a non smart phone...
Zythyr said:
Is it just me or everyone else that is experiencing a super long time in charging their phone to full battery? I am running the froyostone latest build and I have already followed all the guides in this forum to save battery life. The issue I am having is that it takes many hours to recharge the battery to full when connected to a wall charger.
It took 5 hours to go from 30% battery to 90%.
*no i wasn't charging the phone with the phone turn off*
Click to expand...
Click to collapse
Current Widget from the Market can tell you how many mA your phone is getting when it's charging.
this is just an approximation formula. a lithium ion battery charger is more sophisticated than this. it first brings battery voltage up to 20% safely (because any voltage below this is the harmful zone of operation), then it stuffs the battery at full capacity upto 80%. then in the 3rd stage, the current drops linearly with time.
over the past year, my stock battery gives me the following profile:
20-80% -> 1 hour (800-820ma constant, unless phone is awake)
80-100% -> 1 hour (800 -> 0ma)
by 100% i mean 0ma charge current. not 100% on the battery icon. you should be aware that the battery is still charging even after the indicator reaches 100%. but the current is insignificant (10-20ma)
even though the charger is rated at 5v 1A, it supplies only 820ma current at the maximum. this is normal. also for a lion battery the safe operating regions are around 20-90%. by safe i mean prolonging battery life. this roughly corresponds to 3.6v - 4.0v. avoid overcharging your battery frequently.
also someone mentioned current widget as a good approximate tool to study battery performance. you might also want to delete batterystats.bin and condition your battery once (i.e. fully discharge and fully recharge). this will force android to re-determine the new 0% and 100% levels. search the android forums for this.
hope this helps.
leehobin said:
Charging time = capacity of battery x 1,4 / charging current
HD2 stock battery= 1230mAh x 1,4 / 1000mA = 1,7 hours
Best
leehobin
Click to expand...
Click to collapse
silenced3 said:
this is just an approximation formula. a lithium ion battery charger is more sophisticated than this. it first brings battery voltage up to 20% safely (because any voltage below this is the harmful zone of operation), then it stuffs the battery at full capacity upto 80%. then in the 3rd stage, the current drops linearly with time.
over the past year, my stock battery gives me the following profile:
20-80% -> 1 hour (800-820ma constant, unless phone is awake)
80-100% -> 1 hour (800 -> 0ma)
by 100% i mean 0ma charge current. not 100% on the battery icon. you should be aware that the battery is still charging even after the indicator reaches 100%. but the current is insignificant (10-20ma)
even though the charger is rated at 5v 1A, it supplies only 820ma current at the maximum. this is normal. also for a lion battery the safe operating regions are around 20-90%. by safe i mean prolonging battery life. this roughly corresponds to 3.6v - 4.0v. avoid overcharging your battery frequently.
also someone mentioned current widget as a good approximate tool to study battery performance. you might also want to delete batterystats.bin and condition your battery once (i.e. fully discharge and fully recharge). this will force android to re-determine the new 0% and 100% levels. search the android forums for this.
hope this helps.
Click to expand...
Click to collapse
wow ! thanks alot !
Is it bad to let my charge over night overnight? I thought it would stop charging when it got full to avoid overhanging.
Sent from my HTC Inspire 4G
Since I have access to a a battery simulator and charger... the best way to recondition a battery is:
1. Create a low battery scenario by lowering the input voltage to just a hair above 2.7 volts (I had to create a shim to get to the battery receiver leads).
2. Boot with full 4.2 and in ClockWork remove battery stats
3. Drain and Charge battery to 4.2
I get enterprise email and I get a lot of mail daily that I have to read and respond to (150 or more -- no I don't respond to all of them), plus the phone calls, RSS reading and some texting plus a pic here and there and maybe a couple of you tube videos. I get more than 24 hours until the 15 % comes up. 50 hours would be nice but that did not even happen in my black berry with Edge only.
Mine improve 3 fold from sub 7 hours to 24 plus (yes I sleep late so probably the phone gets a 6 hour rest but the enterprise email and text is pushed down even then as I work with folks from Asia and Europe as well.
logdrum1 said:
Since I have access to a a battery simulator and charger... the best way to recondition a battery is:
1. Create a low battery scenario by lowering the input voltage to just a hair above 2.7 volts (I had to create a shim to get to the battery receiver leads).
2. Boot with full 4.2 and in ClockWork remove battery stats
3. Drain and Charge battery to 4.2
I get enterprise email and I get a lot of mail daily that I have to read and respond to (150 or more -- no I don't respond to all of them), plus the phone calls, RSS reading and some texting plus a pic here and there and maybe a couple of you tube videos. I get more than 24 hours until the 15 % comes up. 50 hours would be nice but that did not even happen in my black berry with Edge only.
Mine improve 3 fold from sub 7 hours to 24 plus (yes I sleep late so probably the phone gets a 6 hour rest but the enterprise email and text is pushed down even then as I work with folks from Asia and Europe as well.
Click to expand...
Click to collapse
How do I create a low battery scenario by lowering the input voltage to just a hair above 2.7 volts?
hiltun said:
Is it bad to let my charge over night overnight? I thought it would stop charging when it got full to avoid overhanging.
Sent from my HTC Inspire 4G
Click to expand...
Click to collapse
Yes, the "charger" that you plug into the wall is just a power supply, the actual "charger" is in the phone, and when it detects the battery is full it stops charging.
I am sure most of you have realized the fact that when you unplug the Tab from the charger, even it showed fully charged, the battery drop right down to 99% or 98%, which is not that normal with other android phone.
I took a deeper look here. I have a widget which can monitor the battery voltage. When the Tab is connected to the plug and fully charged, the voltage is showing at around 4150mv, which is the normal fully charged voltage for most of the android phones. The moment you unplugged the charger, the voltage drop to around 4070mv. I guess most of the phone judge the battery level by voltage. The differences of the voltage makes the battery level drop to 99% or 98%.
Another fact I found is that the voltage changes quite a lot when the Tab is on different loads. A simple example is that when I wake my Tab up from a sleep mode (black screen to desktop), I can see that the battery voltage widget showing a 100mv drop. (This can be easily reproduced, just put a battery widget which can show voltage on desktop, lock your screen for a few minutes, after that unlock your Tab and keep looking at your voltage for a few seconds, you will notice the difference).
I basic Physics tell me that this kind of voltage drop is cause by the running current and the internal impedance of the battery. But still I am not so sure about the 100mv drop is normal or not? It is bigger that is should be (causing by the not well made battery which have larger than normal internal impedance)?
Sorry for the English style, it is not my mother tongue. Thank you. More discussion is welcome.
I also notice the last 10 or so percent going in minutes
nothing either of you are describing is abnormal behavior for Lithium ion cells.
almost all of this has been discussed ad nauseum.
crazy talk said:
nothing either of you are describing is abnormal behavior for Lithium ion cells.
almost all of this has been discussed ad nauseum.
Click to expand...
Click to collapse
Well, there you go
Theres another mystery to be resolved. How come a two amp/hour charger needs four hours to charge a four amp battery instead of the aprox two hours it should take?
Sent from my GT-P1000 using XDA App
Tiamath99 said:
Theres another mystery to be resolved. How come a two amp/hour charger needs four hours to charge a four amp battery instead of the aprox two hours it should take?
Sent from my GT-P1000 using XDA App
Click to expand...
Click to collapse
The charging current is not constant. The maximum is 2 amp. But this is probably available when the batter level is very low. As the batter level goes up, the charge current goes down. Meanwhile, the charger would provide power for the device to operate if you were charging it with power on, which uses some of the amps.
The explanation does not satisfy me. It would certainly explain why it charges in a little bit more Time than expected with the 2 amp charger, the problem is that the charging time is about four hours, that's double the time needed for charging.
For example the Archos 70 internet tablet has a 3000 miliamp battery and a 2 amp charger. Time to full recharge? 90 minutes.
As it should be.
Sent from my GT-P1000 using XDA App
Charging current is usually lowered for example when battery overheats while charging. Also, if you use the device while charging, then of course you are slowing down the charging as well.
Tiamath99 said:
The explanation does not satisfy me. It would certainly explain why it charges in a little bit more Time than expected with the 2 amp charger, the problem is that the charging time is about four hours, that's double the time needed for charging.
For example the Archos 70 internet tablet has a 3000 miliamp battery and a 2 amp charger. Time to full recharge? 90 minutes.
As it should be.
Sent from my GT-P1000 using XDA App
Click to expand...
Click to collapse
Hmm, the Archos is not telling the whole truth. It'll try to explain what I know. Lithium based batteries have a two stage (some people say three!!) charging process.
The first phase is the constant current phase, this pumps in as much current as possible (within the constraints of the charger, battery size, battery temperature etc). So with a 2 amp charger the full 2 amps will hit the battery, probably less if the device is switched on as the device will take some of the power from the charger.
The first phase continues until the battery voltage is about 4.1 or 4.2 volts then phase 2 starts. At this point the battery is probably about 70-80% charged. The 2nd phase is a constant voltage charge and will take the charge from 70-80% up to 100%.
The 2nd phase is what takes the time, as the voltage hitting the battery is now fixed at 4.1/4.2 volts the charging current steadily reduces as the battery becomes more charged. Therefore it may take 20 minutes to get from 80% to 90% charged but 40 minutes to get from 90% to 100%.
There is a small graph on the bottom of this web page-
http://shdesigns.org/lionchg.html
So why do some devices take longer to charge then others? Apart from different chargers & size of the battery the other main factor is the charging circuit in the device. Some devices do not do the slower phase 2 charge resulting in a battery that is only 70-80% charged, the device will of course tell you it is 100% charged but it is not, so for example out of the 3000mA/H battery in the Archos only ~2500mA/H will actually be availble. Other devices may push the charge voltage on the phase 2 charge to make it quicker - this is seroiusly bad for the battery though.
Make sense??
faugusztin said:
Charging current is usually lowered for example when battery overheats while charging. Also, if you use the device while charging, then of course you are slowing down the charging as well.
Click to expand...
Click to collapse
Right but when you charge it with all apps closed and the screen off the power consumition is minimal so it shouldn't affect the charging time very much.
Sent from my GT-P1000 using XDA App
m2te said:
Hmm, the Archos is not telling the whole truth. It'll try to explain what I know. Lithium based batteries have a two stage (some people say three!!) charging process.
The first phase is the constant current phase, this pumps in as much current as possible (within the constraints of the charger, battery size, battery temperature etc). So with a 2 amp charger the full 2 amps will hit the battery, probably less if the device is switched on as the device will take some of the power from the charger.
The first phase continues until the battery voltage is about 4.1 or 4.2 volts then phase 2 starts. At this point the battery is probably about 70-80% charged. The 2nd phase is a constant voltage charge and will take the charge from 70-80% up to 100%.
The 2nd phase is what takes the time, as the voltage hitting the battery is now fixed at 4.1/4.2 volts the charging current steadily reduces as the battery becomes more charged. Therefore it may take 20 minutes to get from 80% to 90% charged but 40 minutes to get from 90% to 100%.
There is a small graph on the bottom of this web page-
http://shdesigns.org/lionchg.html
So why do some devices take longer to charge then others? Apart from different chargers & size of the battery the other main factor is the charging circuit in the device. Some devices do not do the slower phase 2 charge resulting in a battery that is only 70-80% charged, the device will of course tell you it is 100% charged but it is not, so for example out of the 3000mA/H battery in the Archos only ~2500mA/H will actually be availble. Other devices may push the charge voltage on the phase 2 charge to make it quicker - this is seroiusly bad for the battery though.
Make sense??
Click to expand...
Click to collapse
Wonderful explanation mate.
But still I just can't understand why it took one hour and 50 minutes to go from 10% to 60% . In theory it should be phase 1 charging at full 2 amps hour.
Since the 50% charged is about 2 amps , shouldn't it have charged that amount in an hour?
Sent from my GT-P1000 using XDA App
I've been wondering this too. I read in other reviews that it takes 3 hours for a full charge but It took me 3.5 hrs to go from 55% to 100%. sounds like samsung is very conservative with it's stages.
The first problem is something that those of us with Droid Incredible devices have had for a long time. Many people resort to bump charging (i.e., charging to 100%, unplugging for a little while, then plugging it in to let it finish charging). It's an annoying problem.
Need help here my xda fellows.
I am not sure if this is normal, but my tab drops from 70% to 58% overnight with flight mode on and no apps opened. (i use lanucher pro if that counts)
Another weird thing is when i turn off the tab and charge, that battery meter only shows about half full and no matter how long i charge it for it stays the same. But then when i fire it up, android system tells me its 98%. And when i try to turn it off and charge it, now the meter shows almost full and will eventually shows that 100% symbol.
It seems to me some ppl get excellent battery life but not in my case. Could there be any problem with the battery? (running jk1 fw non root).
Sent from my GT-P1000 using XDA App
Another issue is that once the charger hits 100%, it shuts off. While the tab is plugged in and on, it will drain the battery down some...maybe to 95%...before the charger turns back on. However the whole time it is plugged in it will show 100% after having reached max charge.this is by design on almost all new battery devices to prevent damage to the battery and simultaneously prevent people from complaining their battery is draining even though it is plugged in.
This also explains why some people see such a quick drop after unplugging. If they happen to unplug at the bottom of a trickle charge cycle.
Again, not a bug.
Sent from my SCH-I800 using XDA App
As I have noticed these issues with my Tab as well, these were all very well explained and knowledgable replies.
Just to put in my two cents, I have noticed that the Tab actually seems to charge noticably faster if I leave it on, rather than turning it off. I do, however, usually turn off everything on the power widget and put it into airplane mode as well, mind you. But, the speed in which it recharges while turned on as opposed to the recharge speeds when completely shut off are fairly noticeable.
Anyone else notice this with their Tab or any other device, and/or have some insight regarding why this occurs? Kudos for the previous informative explanations, btw.
Hi everyone,
How long do you charge your SGT to an ac/dc outlet? And how long does the battery life lasts after its fully charged?
Advance thanks!
For mine, charging time (AC) typically 4 hours (from 5 to 10% left). Usage time is subjective, continuous usage on games or music varies differently. I should said, about 6 hrs plus of continously usage on WIFI & games.
Mine takes a long time to charge, nearly 7-8 hours from 0 to full! Don't know why it's so slow considering I am using the original power cable provided by Samsung!
By far the quickest method to charge the Tab is to first power it down so it is totally switched off.
Now plug in the cable and charge using the supplied power plug.
You will notice a marked difference in time taken to charge fully.
Pat123 said:
Mine takes a long time to charge, nearly 7-8 hours from 0 to full! Don't know why it's so slow considering I am using the original power cable provided by Samsung!
Click to expand...
Click to collapse
This is an important issue so shall we do a systematic comparison? First,we will charge the battery 100% then we will watch a movie at 100% brightness setting for exactly 1hour. Close the movie and check battery %, report here. Game?
According to my usage scheme (except calling), I manage to get 2 days on my GTab when my NS or MT4 needs to change battery once during a day.
Mine takes about 3 1/2 to 4 hours from about 20-30%. I did a lot of reading on lithium ion batteries and what I found is that the more you fully discharge and charge the worse the battery gets, which is the EXACT OPPOSITE of the old style nickel cad batteries.
In order to prolong the life of your SGT battery (which is crucial since we cant removie it) it is recomended that you top off your charge whenever you can. I work part time and am a full time college student so I always have about 4 hours every morning, wether its at work or at home. So once a day I charge my tab, its usually in the 20%-50% range when I charge it.
Just make sure that you do infact have the time to complete the full charge and remember that the last 10% will take the same amount of time as the first 40% due to the fact that li-ion's do the trickle charge at the end.
I charge it over night, every 2 days
For me the longer charge time usually is from 99% to fully charge. That can take up to an hr.
n2s2k2india said:
This is an important issue so shall we do a systematic comparison? First,we will charge the battery 100% then we will watch a movie at 100% brightness setting for exactly 1hour. Close the movie and check battery %, report here. Game?
Click to expand...
Click to collapse
Yep, sounds good! Also, let's keep the phone radios ON i.e. no airplane mode and the movie should be running from External SD card! Will try it out tonight with 3 Idiots movie which was bundled with my Tab
Pat123 said:
Yep, sounds good! Also, let's keep the phone radios ON i.e. no airplane mode and the movie should be running from External SD card! Will try it out tonight with 3 Idiots movie which was bundled with my Tab
Click to expand...
Click to collapse
I watched a full movie. There was a drop of 20%. Normal?
MasterRy88 said:
Mine takes about 3 1/2 to 4 hours from about 20-30%. I did a lot of reading on lithium ion batteries and what I found is that the more you fully discharge and charge the worse the battery gets, which is the EXACT OPPOSITE of the old style nickel cad batteries.
In order to prolong the life of your SGT battery (which is crucial since we cant removie it) it is recomended that you top off your charge whenever you can. I work part time and am a full time college student so I always have about 4 hours every morning, wether its at work or at home. So once a day I charge my tab, its usually in the 20%-50% range when I charge it.
Just make sure that you do infact have the time to complete the full charge and remember that the last 10% will take the same amount of time as the first 40% due to the fact that li-ion's do the trickle charge at the end.
Click to expand...
Click to collapse
Thanks for pointing out.I was following the old ni-cad battery method! So,basically you and Beards above are contradictory?
Differences between both types of batteries.
http://www.ehow.com/about_5449906_lithium-vs-nickel-cadmium-batteries.html
Basically, no harm discharging the batteries if constantly using. However, it is best to charge it before storage (probably for a period of time) and do a full charge when using.
3-4 hours charging time. one time i got it to last for 3 days (79 hours). i have a screencap but i need 3 more posts to put the links here. my normal usage is 2 days.
henrylam said:
Differences between both types of batteries.
http://www.ehow.com/about_5449906_lithium-vs-nickel-cadmium-batteries.html
Basically, no harm discharging the batteries if constantly using. However, it is best to charge it before storage (probably for a period of time) and do a full charge when using.
Click to expand...
Click to collapse
Lithium rechargeable battery dies totally (no longer accept charge) if it's left totally discharged for a few months. In addition, it's better to "condition" (totally let it runs out and charge it immediately till it full after about 1-2 months of use) to keep optimized performance.
n2s2k2india said:
Thanks for pointing out.I was following the old ni-cad battery method! So,basically you and Beards above are contradictory?
Click to expand...
Click to collapse
When I said "power it down" I did not mean to let the Tab run down until it powered off.
What I was saying is to get the quickest charge method it is best to 'switch off' the Tab ('power it down' & 'switch off' = same meaning).
The correct usage for the Tab's battery is when new to first fully charge and then discharge several times. Once you have done this the battery will be optimized.
From now on it is best to keep the battery 'semi-full' and not let it run down completely. I normally let mine run down to around 50% and then recharge to full.
However, after every 30 recharges it is a good idea to 'reprogram' the battery by clearing out any memory loss (I know, I know... they don't suffer memory loss). What you need to do is after every 30 recharges let the battery run completely down and I mean completely until it will switch itself off.
Now with the Tab switched off, recharge. Once the large green battery icon is full leave it in for a further 1hr then disconnect.
If you are not going to use the Tab for a long and lengthy period (heavens knows why though), to optimize the battery never stow away a battery which is in a Full Charge.
Batteries that are not going to be used for a lengthy period should only be charged to around 70% and then left in a cool and dry place.
That was very instructive ,infact I copy pasted it in Color Notes. So, basically, 30 recharges is like once a month, I can put a reminder in the Calender. Thanks and I also pressed the button.
n2s2k2india said:
That was very instructive ,infact I copy pasted it in Color Notes. So, basically, 30 recharges is like once a month, I can put a reminder in the Calender. Thanks and I also pressed the button.
Click to expand...
Click to collapse
No problem...
...... and thanks for the vote. All votes are gratefully received as they are converted into a charitable donation.
Is this the definitive way to do it?
http://hemorrdroids.net/battery-calibration/
Those steps came from here, xda devs.
1. Run the device down until it turns itself off.
2. Turn it back on and wait for it to turn itself off again.
3. Remove the battery for 10 seconds.
4. Replace the battery, but leave the device off.
5. Charge the device until full and then for another hour.
6 **Root users only** Using a Terminal Emulator, type “su” enter, followed by “rm /data/system/batterystats.bin”
7. Run the device’s battery down until it turns itself off.
8 .Turn the device on and charge for at least 8 hours.
9. Unplug the device, turn off, then charge for another hour.
10. Unplug the device, turn on, wait 2 minutes.
11.Turn off again and charge for another hour.
12. Restart and use as normal.
Quite a performance! Does it preserve battery lifespan, or is it more to do with slowing down battery drain and does it really work?
He mentions 2 interesting things:
"Generally charge them before they get lower than 50%". I didn't know that, so it's actually better to charge more often and not let it drain down?
"USB charging is actually better for the battery and you may get up to 1 hours more standby time." So you gain an hour standby but it takes twice as long to charge the phone.
Nice manual
Will try it
Sent from my GT-I9100 using Tapatalk
Some will say that its complete nonsense .
Overcharge for 8 hours ??? how does the battery not turn charging off at 100%
Recharge 50% the accepted figure is not to go below 20% to often .
They may be right or wrong their are so many contrasting views on battery charging .
jje
Discharging battery and then reloading it fully, it's the normal procedure for battery calibration for almost all the devices in the world (including computers, etc.).
Step 8 to 11 seems quite a bit strange however.
hm, just seen a different way to calibrate the battery. basically, you drain the battery, take it out for a couple of minutes, put back in, then try to turn it on to make sure it's completely flat.
then you charge it fully, then boot to recovery and wipe battery stats then drain and fully charge. so... which one is more likely to be the better?
that guy also advises to repeat that 12 step, 1-2 day long tedious procedure "every month or so".
it is lunacy honestly speaking
does it work? did he died ?
LOL I dont understand .... I just read in another day that NEVER LET BATTERY GO LOWER THAN 15% and know I read "drain drain drain" Oh welll ...
I also thought that at 100% the charging process stops.
Although this thread is about battery calibration, these questions about battery charging always pop up.
Battery calibration is the process by which you set your device with your battery data.
Every single battery is slightly different. Although there are minimum stantards to every spec of the battery, each battery is different.
Calibrating your battery is nothing more than setting your phone to the real specs of your own battery (since the phone comes configured with the battery factory standards). For example, your phone may be set to use a battery which maximum charge is 1650 mAh, but your battery has a maximum charge of 1625 mAh. That may be within the acceptable factory standard, meaning you have a normal battery, but that also means that your phone will never indicate a 100% charge after you unplug the charger.
If you calibrate that hypothetical battery, you will "tell" your phone that its maximum charge capacity is actually 1625 mAh, meaning from that on your phone's battery indicator will be more accurate.
For that reason, it is necessary to fully discharge and fully recharge your battery for the calibration process, since your device must read the actual specs (minimum charge, maximum charge, charging current, etc) of the installed battery.
I don't know about how many times this full cicle (discharging and recharging) must be performed, but that is the reason why it must be performed for the calibration to succed.
A DIFFERENT THING is the normal discharging and charging process during normal use of the phone.
In this case, you should NEVER let your battery go under 20% and, what few people know, it also should never go over 95%. This stresses the battery and diminish its life time.
Also, and there's a lot of doubts about this, the lower the charging voltage, the slower the charging process, but the longer the battery life.
High charging voltages (like the one used by the charger sold with the phone, which is around 5V) stress the battery, diminishing considerably its life time.
That is true for all lithium-ion batteries!
Therefore it is better to charge your phone through USB (which uses around 4,3V) than to do it using the charger provided with the phone.
You may be asking "If the charging voltage of the charger provided by the manufacturer stresses the battery, why does the manufacturer provide such charger?"
For purely commercial reasons! Higher voltages mean shorter charging cycles, which please the consummer. Moreover, the battery capacity loss with the factory provided charger is around 15-20% a year (considering "normal" to "heavy" use). That is to say that after a year your battery will only reach 80-85% of the maximum charge it used to reach when it was new. And by that time your manufacturer expects you to consider buying a new phone, with more features.
Summing it up:
- calibration is just the process by which you "tell" your phone what the real specs of your battery;
- in normal use, charging your phone through USB is better than doing it with the manufacturer provided charger;
- try not to let your battery charge go under 20% nor above 95%;
- if you're interested, read more about it at batteryuniversity.com
Spin three times in clockwise direction with left middle finger on your nose while blinking your eyes with the phone plugged in.
Jump in the air 3 times.
Unplug phone.
Thats some messed up instructions.
Do you have any idea what kind of strain you're putting on the battery while doing all that?
All you're gonna get is some extra minutes, maybe an hour but is it really worth it because you're just reducing overall battery lifespan by doing that procedure over and over.
Specially when you constantly keep the battery at 4200mV (full charge) for a long time. You're practically killing it by overcharging.
Transmitted from a Galaxy far far away via XDA telepathy.
m2smoe said:
Spin three times in clockwise direction with left middle finger on your nose while blinking your eyes with the phone plugged in.
Jump in the air 3 times.
Unplug phone.
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Click to collapse
that made me chuckle
Never done a calibration on a battery and most of the time i even didn't let battery to discarge very much and then load it again. Never had a problem with battery life it last how long it should last every time and i've used that battery for years. So the battery "calibration" are kinda useless.
Matriak31 said:
that made me chuckle
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Well then, my job here is done
m2smoe said:
Well then, my job here is done
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it is indeed...i should follow you just to have more laughs like that cheers
RenatoN said:
Although this thread is about battery calibration, these questions about battery charging always pop up.
Battery calibration is the process by which you set your device with your battery data.
Every single battery is slightly different. Although there are minimum stantards to every spec of the battery, each battery is different.
Calibrating your battery is nothing more than setting your phone to the real specs of your own battery (since the phone comes configured with the battery factory standards). For example, your phone may be set to use a battery which maximum charge is 1650 mAh, but your battery has a maximum charge of 1625 mAh. That may be within the acceptable factory standard, meaning you have a normal battery, but that also means that your phone will never indicate a 100% charge after you unplug the charger.
If you calibrate that hypothetical battery, you will "tell" your phone that its maximum charge capacity is actually 1625 mAh, meaning from that on your phone's battery indicator will be more accurate.
For that reason, it is necessary to fully discharge and fully recharge your battery for the calibration process, since your device must read the actual specs (minimum charge, maximum charge, charging current, etc) of the installed battery.
I don't know about how many times this full cicle (discharging and recharging) must be performed, but that is the reason why it must be performed for the calibration to succed.
A DIFFERENT THING is the normal discharging and charging process during normal use of the phone.
In this case, you should NEVER let your battery go under 20% and, what few people know, it also should never go over 95%. This stresses the battery and diminish its life time.
Also, and there's a lot of doubts about this, the lower the charging voltage, the slower the charging process, but the longer the battery life.
High charging voltages (like the one used by the charger sold with the phone, which is around 5V) stress the battery, diminishing considerably its life time.
That is true for all lithium-ion batteries!
Therefore it is better to charge your phone through USB (which uses around 4,3V) than to do it using the charger provided with the phone.
You may be asking "If the charging voltage of the charger provided by the manufacturer stresses the battery, why does the manufacturer provide such charger?"
For purely commercial reasons! Higher voltages mean shorter charging cycles, which please the consummer. Moreover, the battery capacity loss with the factory provided charger is around 15-20% a year (considering "normal" to "heavy" use). That is to say that after a year your battery will only reach 80-85% of the maximum charge it used to reach when it was new. And by that time your manufacturer expects you to consider buying a new phone, with more features.
Summing it up:
- calibration is just the process by which you "tell" your phone what the real specs of your battery;
- in normal use, charging your phone through USB is better than doing it with the manufacturer provided charger;
- try not to let your battery charge go under 20% nor above 95%;
- if you're interested, read more about it at batteryuniversity.com
Click to expand...
Click to collapse
You should post the source for your info, cause I am seeing a lot of incorrect information in here.
If you guys want to learn about your battery, visit the site Battery University
The OEM replacement battery is worth about $10.
Save yourself the stress....use it...charge it when you need to...if the battery ever fails cough up $10.
Sent from my GT-I9100 using XDA App
The way I would calibrate my batteries is a bit different. Lithium ion batteries don't need to be drained then charged to full AFAIK, and I even remember reading somewhere that draining it is actually only for NiCad batteries. It used to be relevant when phones were using NiCad but not anymore.
Read: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
As such I have read that the universal way to 'calibrate' batteries is by charging to full, using for a couple of mins and charging again.
What I have been doing is:
1. Charge to full when phone is switched off (doesn't matter if it's from 0% or 99%).
2. Switch on the phone, use for 5 mins.
3. Switch off then charge until full.
4. Repeat step 2 once more
That's it! It seems pretty simple but it seems to have worked for me.
The way i do it is different. Firstly i have the battery calibration app from the market by Nema..then i fully charge my phone and when it says its fully charge i go into the app. There it gives me the instructions on how to calibrate...First i wait till i charge the phone without any interruptions. then click on the app and wait til the battery goes to 4200MV and then i press the calibrate button and then the app does it for me. Then i drain the battery again without any interuptions or breaks during that time and then charge it again once battery dies down and thats it.
there are so many ways being touted on the forums you really dont know which one to go for...but whatever works for each person then who are we to tell someone different just thought i share that
If my battery dies, or gets significally lower capacity after 1 or 2 years of usage, I'll just buy a new one if I plan to keep the phone longer.. Going through these rituals and painstakenly monitor my battery % so that it never goes below 20 % or above 95 % is just not worth it.. Doesn't increase the life THAT much anyway.. I use the phone until I hear the beep for low batt, and from there until I have a charger available.. Most of the time it's before it reaches 10 %, thats good enough for me.. Once in a while it might even go so far that it dies.. Then I charge it till it says 100 %.. Most of the times I plug it when going to bed, and let it charge over night.. This is normal usage and what the battery should be designed to handle, and so far it does..
Ever since I first got my Note 4, I've loved two things about it more than almost everything else: battery life and charging speed.
Two nights ago, I was bored and - I know, it's a strange thing to do when bored - decided to see how fast fast charging was compared to normal charging. It took my phone about 123 minutes to fully charge from 0 to 100% with fast charging disabled.
But that's not what I care about. What I care about is the fact that, before I disabled fast charging and fully charged my phone from 0, I would typically have about 10% left after a twelve hour cycle that included around 5 hours of screen-on time.
After my slower charge, I found that, after about 11 hours, I'd had my screen on for 4.5 hours, and my battery was still sitting at 55%. This improvement absolutely astounded me, and I want to encourage all of you to see how your mileage varies (or perhaps doesn't) by disabling fast charging.
I'd like to add that I've always been a huge proponent of fast charging, and I've always dismissed the common notion that it's bad for a phone's battery. But I can't ignore my own results.
EDIT: I should add that this was without power-saving mode or airplane mode enabled at any point in time. And the screen brightness was set to the same value I use generally, and not the minimum I'd use in total darkness.
I haven't used fast charge except for the first few days I had the phone. I just never needed my phone charged fast.
I can get about 6.5 hours of screen on time with around 20% battery left on power saving mode.
droidx2.3.3 said:
I haven't used fast charge except for the first few days I had the phone. I just never needed my phone charged fast.
I can get about 6.5 hours of screen on time with around 20% battery left on power saving mode.
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I'd had fast charge enabled until two days ago because I never saw anything but advantages to it. I also should add that I don't use power saving features until I'm down to at least down to 15%. Glad to hear you're getting good performance
I only use fast charging. If I do a heavy use day, I get about 5-5.5 hours of SOT and run out. Not sure how long it lasts.
On average, I charge my phone every third day and get 4-4.5 SOT.
I think my battery life is pretty exceptional. I don't leave the phone on the charger overnight, it gets unplugged immediately and I usually put it on the charger around 15 percent.
Yes, I"m not a heavy user usually. Depends on my work load, sometimes it only lasts two days.
I remember hearing this back in the day. Users reported that trickle charging (ie. Usb to computer) would yield better battery life.
I was curious if this would be the case when I first heard about the fast charging when the note 4 was released, but I haven't tested it yet.
http://forum.xda-developers.com/xperia-z/help/trickle-charging-improve-battery-life-t2332947
I use a spare oem battery/cradle charger. Which does not have fast charging, so the battery would technically be charged slower than through the phone with fast charging. I haven't noticed any difference in battery life between the two.
Then again, my phone usage changes by the time I swap batteries.
Sent from my Note 4.
I guess I'm different than most. It's nothing for me to kill a battery in a work day. When I'm 50% +/- I'll plug in because I never know when I'll need a full charge or where I will be an need it. When going out of town I typically will carry at least one of my two backup battery packs.
I will keep power saving mode on and my screen at full brightness. No WiFi enabled but I do use BT from time to time.
5.5 to 6 hours usage sounds about right for me. 24-48 hours on one charge and I say someone isn't using their phone enough.... LoL
Im running Pac Rom 5.1.1 on Note 4 DE and the charger definitely makes a difference.
A "normal" charger (pretty much anything under 2.1A) will charge much slower than a 2.1A charger.
mithusingh32 said:
Im running Pac Rom 5.1.1 on Note 4 DE and the charger definitely makes a difference.
A "normal" charger (pretty much anything under 2.1A) will charge much slower than a 2.1A charger.
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But have you noticed any difference in your battery life after a fast charge vs a slow charge?
Bicknasty said:
But have you noticed any difference in your battery life after a fast charge vs a slow charge?
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You guy need to repeat this charging business in a scientific test manner.
For example.
1) Discharge to 50%-80% (choose a level.)
2) Slow charge to 100%.
3) Run a loop of a video at some preset brightness, not auto, until the battery is at 50%-80% again. Note the time.
4) Fast charge to 100%.
5) Repeat 3 in the exact same way.
Then compare the times of video playback for the two charging techniques.
My guess is that if you were to do it right, you would get identical results.
nabbed said:
You guy need to repeat this charging business in a scientific test manner.
For example.
1) Discharge to 50%-80% (choose a level.)
2) Slow charge to 100%.
3) Run a loop of a video at some preset brightness, not auto, until the battery is at 50%-80% again. Note the time.
4) Fast charge to 100%.
5) Repeat 3 in the exact same way.
Then compare the times of video playback for the two charging techniques.
My guess is that if you were to do it right, you would get identical results.
Click to expand...
Click to collapse
You'd also have to play a movie that is stored on phone and go on airplane mode, since signal strengths change power usage of radio.
Slow and steady wins the endurance race
Owners of electric rc cars/planes often charge lipo batteries to tailor their output for various track conditions. Faster higher voltage charges are more punchy and have increased output but suffer shorter run times. Slower lower voltage = milder output and longer run times.
Jugger naut said:
Owners of electric rc cars/planes often charge lipo batteries to tailor their output for various track conditions. Faster higher voltage charges are more punchy and have increased output but suffer shorter run times. Slower lower voltage = milder output and longer run times.
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Slower or faster discharge in an electrical motor depends on how much and how fast the motor can consume energy and how quickly a battery can dispense it - this relates directly to the performance of the motor like horsepower and torque. The charge used up is still the same. The amount of electricity stored depends only on the chemical composition of the battery, not on how you charge it. So faster or slower discharge still uses up the same amount of electricity - the energy stored/dispensed remains the same.
On the other hand, in a very demanding situation like RC, a faster charge can afford a faster peak discharge rate of battery. This is due to how the chemicals in LiPo batteries undergo transformations between homogeneous and heterogeneous states depending on the rate of charge. The faster the charge, the faster the maximum rate of discharge. A common misconception is that a slower rate of charge will amount to more charge stored. That is generally incorrect. Slower charging can only benefit the useful lifetime of the battery.
A display or a cpu of a smartphone are unlike an electrical motor in that they consume the same nominal amount of energy for a given task and at a very low rate. The rate of energy consumption for a smartphone is far lower than the possible rate of discharge of the battery is has.
For example, you can charge (and discharge) a battery in smartphone like S6 in about 80 minutes (and that is still FAR slower than you can possibly charge/discharge such a battery.) But the battery will last many many hours even under the heaviest load. So slower charging is pointless for smartphones.