Database Users

[Q] Battery Levels on 2400MAH Extended Battery

I got an extended 2400mah battery from ebay (they are very cheap !) and i gave it a visual inspection, they seem very well built and so far run very nice and cool in the phone.
The only issue is the linux android kernels are reporting it as a "standard" battery !?
I have done the proper rm /data/system/batterystats.bin and then shutdown and fully charge the battery with phone off and then boot up so set the "top barrier" so i can charge correctly in android, but how am i supposed to get a reliable discharge reading ?
i have hammered my phone all day and im down to 15% now, but the battery voltage is still up at 3.795
according to the LI-ION battery discharge curve 3.8 = around 50% battery life still available.
Am i really at 15% ?
-Edit
LOL !!! i read on another thread that someone shut down the phone and remove the battery, then put it back in and load back up and got another 50%, i just tried this and now i have 70%.
Hilarius !

Visentinel said:
I got an extended 2400mah battery from ebay (they are very cheap !) and i gave it a visual inspection, they seem very well built and so far run very nice and cool in the phone.
The only issue is the linux android kernels are reporting it as a "standard" battery !?
I have done the proper rm /data/system/batterystats.bin and then shutdown and fully charge the battery with phone off and then boot up so set the "top barrier" so i can charge correctly in android, but how am i supposed to get a reliable discharge reading ?
i have hammered my phone all day and im down to 15% now, but the battery voltage is still up at 3.795
according to the LI-ION battery discharge curve 3.8 = around 50% battery life still available.
Am i really at 15% ?
-Edit
LOL !!! i read on another thread that someone shut down the phone and remove the battery, then put it back in and load back up and got another 50%, i just tried this and now i have 70%.
Hilarius !
Click to expand...
Click to collapse
What did you have to edit to get Android to do proper readings on the extended battery?
i charge my batter to 100% then leave the charger connected for another 4 hours. when i unplug, my battery reads 100% for about 3-4 hours then its starts to discharge....
how do i match the level of the battery with the android readings?

Time to Recharge to Full Battery

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.
Click to expand...
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.

Battery not charging past 80% after battery change

Hi folks,
I recently got a new battery for my S3 neo to replace my rapidly deteriorating original.
since the switch, i've been unable to charge EITHER battery up to 100% without waiting many hours for it trickle charge up from 80%.
here's the background:
i switched out the batteries when the old one was fully charged (since i was going to store it).
when i put in the new one, it read 84% when turned on again, i thought this was acceptable, since the battery would have been stored for a while before i bought it.
however, when charging this battery up again, it would hit around 76-77% and start trickle charging, as if charging from 95 to 100%
im not really sure how to fix this, and i have tried wiping cache, and running the battery down to 0% and charging from there. i have my theory, but am not sure its at all correct!
my theory (please tell me if i'm wrong)
when the battery jumped from 100% to 84% following the battery switch, that reset 84% to "fully charged" somehow
this would leave being fully charged as 1764Mah in the battery instead of 2100Mah
and by charging to 84%, then switching in a 100% battery this might be somehow reversed?
Would really appreciate any ideas people may have, since the already poor battery life (2 hours screen on) has now gotten even worse!

Thollupped said:
Hi folks,
I recently got a new battery for my S3 neo to replace my rapidly deteriorating original.
since the switch, i've been unable to charge EITHER battery up to 100% without waiting many hours for it trickle charge up from 80%.
here's the background:
i switched out the batteries when the old one was fully charged (since i was going to store it).
when i put in the new one, it read 84% when turned on again, i thought this was acceptable, since the battery would have been stored for a while before i bought it.
however, when charging this battery up again, it would hit around 76-77% and start trickle charging, as if charging from 95 to 100%
im not really sure how to fix this, and i have tried wiping cache, and running the battery down to 0% and charging from there. i have my theory, but am not sure its at all correct!
my theory (please tell me if i'm wrong)
when the battery jumped from 100% to 84% following the battery switch, that reset 84% to "fully charged" somehow
this would leave being fully charged as 1764Mah in the battery instead of 2100Mah
and by charging to 84%, then switching in a 100% battery this might be somehow reversed?
Would really appreciate any ideas people may have, since the already poor battery life (2 hours screen on) has now gotten even worse!
Click to expand...
Click to collapse
Which rom are you using? Did you try using battery calibareter?

Just cha ge your custom kernel.

redhead77 said:
Which rom are you using? Did you try using battery calibareter?
Click to expand...
Click to collapse
I'm using the latest version of Rox's Cm12.1 build, with cwm recovery. i've just tried to use a calibrator, and its reset 100% i think, but not sure if that's actually fixed it. and i still have appalling battery life
MoHuToP said:
Just change your custom kernel.
Click to expand...
Click to collapse
unfortunately i cant remember what i currently have installed, but is there a good one for battery life you could recommend? :fingers-crossed:

Please Help moto x play huge battery issue

I used samsung fast charger for 4 months and battery life was all good , then i lost the charger so i had to charge the phone with a "not so fast charger" that took ages to charge my phone.
Never charged to 80% , and battery drain was serious.
That's when i got worried that the charger ive been using might have destroyed my battery.
So bought the "turbopower 15" charger for my MXP and at first it heated up my battery more then 60* (serious overheating issue)
After 2 or 3 charges i figured it only heats up after the percentage is 50% or higher or when i use it while charging.
And now it drain my battery like crazy!,
I just restarted my device into recovery right now and it was 45% but by the time i booted up to recovery it said 25%. How CRAZY DRAINAGE IS THAT??, Please devs help me.
Its like i dont need a stopwatch my battery drain a percent per second.
Im using purenexus 7.1.2 by @GtrCraft witb stock kernal

alihassan1397 said:
I used samsung fast charger for 4 months and battery life was all good , then i lost the charger so i had to charge the phone with a "not so fast charger" that took ages to charge my phone.
Never charged to 80% , and battery drain was serious.
That's when i got worried that the charger ive been using might have destroyed my battery.
So bought the "turbopower 15" charger for my MXP and at first it heated up my battery more then 60* (serious overheating issue)
After 2 or 3 charges i figured it only heats up after the percentage is 50% or higher or when i use it while charging.
And now it drain my battery like crazy!,
I just restarted my device into recovery right now and it was 45% but by the time i booted up to recovery it said 25%. How CRAZY DRAINAGE IS THAT??, Please devs help me.
Its like i dont need a stopwatch my battery drain a percent per second.
Im using purenexus 7.1.2 by @GtrCraft witb stock kernal
Click to expand...
Click to collapse
try going back to stock rom, if the problem persists that means the battery is bad

pijes said:
try going back to stock rom, if the problem persists that means the battery is bad
Click to expand...
Click to collapse
I was just using stock rom but the battery drain was still the same. I dunno if ive messed up the battery because of the "not orignal" chargers or whatever the reason is. I think the battery is now done for. I think Im just gonna sell this phone

Just buy a new battery from ebay, replace it urself. It's easy..

Ajeyvm said:
Just buy a new battery from ebay, replace it urself. It's easy..
Click to expand...
Click to collapse
Thanks god. my battery is back to normal after charging it a couple times with the turbopower 15 charger. now when im home i never let it discharge past 70% this way it stays in good health.
when it went bad it discharged 10% in 20 minutes now its 10% in an hour

alihassan1397 said:
Thanks god. my battery is back to normal after charging it a couple times with the turbopower 15 charger. now when im home i never let it discharge past 70% this way it stays in good health.
when it went bad it discharged 10% in 20 minutes now its 10% in an hour
Click to expand...
Click to collapse
I use tronsmart 3.0 turbo charger (backward capability for quick charge 2.0 devices). Battery life is good. I charge it when it hits 15-30%.

Is this the end of my battery?

I've got an issue with my battery where phone shuts down every time at 30% and won't charge above 80% unless I disconnect and reconnect charger then charges rapidly to 100%
I've heard LiPo batteries are easily damaged and have a short life span. In my case it has came to 0% numerous times. I tried calibrating it and still nothing
Here is some info on the battery.

Are those mA measurement's okay or bad?

These measurements are totally normal

It's probably your rom mate

kenzyyy said:
I've got an issue with my battery where phone shuts down every time at 30% and won't charge above 80% unless I disconnect and reconnect charger then charges rapidly to 100%
I've heard LiPo batteries are easily damaged and have a short life span. In my case it has came to 0% numerous times. I tried calibrating it and still nothing
Here is some info on the battery.
Click to expand...
Click to collapse
Sounds like you need to return it under warranty.

Well I tried many different ROMs and stock firmwares still no luck. I've called service center and they will fix it. I think Li-Ion batteries are far better then Li-Poly

Had that issues on my previous device, Galaxy S4. Shutdowns at ~20% battery, terrible sot. My battery went bad so i replaced it with new battery and that solved it.
Consider replacing battery if flashing stock firmware does not help.
Batteries can last long if you take care of it. I guess you tortured it by draining it all the way to 0% or using the phone while its connected on charger, you should NEVER do that! 20% in my opinion is minimum before you should charge it to prolong battery life. Also if you really want very long battery life, do not charge it above 90%.

marko.dnb said:
Had that issues on my previous device, Galaxy S4. Shutdowns at ~20% battery, terrible sot. My battery went bad so i replaced it with new battery and that solved it.
Consider replacing battery if flashing stock firmware does not help.
Batteries can last long if you take care of it. I guess you tortured it by draining it all the way to 0% or using the phone while its connected on charger, you should NEVER do that! 20% in my opinion is minimum before you should charge it to prolong battery life. Also if you really want very long battery life, do not charge it above 90%.
Click to expand...
Click to collapse
Thank you, I will be sending phone to service center. I really was using it while it was charging and it went to 0% million times.

This is what you guys get with a bad battery

kenzyyy said:
I've got an issue with my battery where phone shuts down every time at 30% and won't charge above 80% unless I disconnect and reconnect charger then charges rapidly to 100%
I've heard LiPo batteries are easily damaged and have a short life span. In my case it has came to 0% numerous times. I tried calibrating it and still nothing
Here is some info on the battery.
Click to expand...
Click to collapse
How long have you had the phone? I doubt li-poly batteries is alot worse than li-ion since both are very similar.