How can i make battery life last longer? - myTouch 4G Q&A, Help & Troubleshooting

i keep trying every rom available for my phone
and in every rom is the same the 100% battery last for like 3 hours then after that the battery drops like every minute even when screen is off?
how can i make battery life last longer?
thanks in advance

Lucky for you I still had copy of it in message box as I got 5-6 requests few hours ago regarding that.
BlackSHELF said:
Well the borderline idea is the same as you already know you have to completely drain it. Now never use any volt meter those people use to completely discharge it as the negative effect I already explained to you in that post. So best way is to do it by recalibrating so what you do is:
1) Fully charge it.
2) Drain it till you get 1%.
3) Go in recovery and wipe battery, reboot (batterystats.bin created).
4) As you still have battery low now let it charge till 100%.
5) Do the cycle again.
NOTE: This is what I would recommend but as we know the whole issue with CWM restarting while phone is off as you can flash the stock recovery and go back as it takes 3sec. If not follow the above.
1) Heavily use your phone so it drain the battery till its 1%
As you will see the low battery light flashing just so you don't lose your data save it by rebooting.
2) As you still have some battery power left you can now go to Recovery and wipe battery stats.
Or you can manually do it from adb shell by using remove command "rm /data/system/batterystats.bin".
3) Keep it on till its turns itself off.
As you may have guessed it still has power left so keep using the device till its drained completely I would recommend rebooting and going in bootloader as it uses more power due to bight screen as Recovery uses less power on display.
4) Now turn it back on again in bootloader till it turns off again.
It will keep turning itself of as no power left, this is what you want. This is safe way to discharge it without having negative adverse effect.
5) Now let it charge via A/C instead of USB.
Now when the light turns green unplug it and replug it till its green again, keep doing that till you see its green only. Now once you reboot in Android it will rebuild the batterystats.bin and you will be fully recalibrated.
Click to expand...
Click to collapse

if i cant go back to stock recovery which procedure do i try the 1st procedure or the 2nd one?

nulights said:
if i cant go back to stock recovery which procedure do i try the 1st procedure or the 2nd one?
Click to expand...
Click to collapse
First one is better for you. Do the cycle fully twice and you will be good to go and it will solve those most common issue like getting green light while its still not 100% or sticking it at 100% for long time and then dropping faster than you can count lol I just did it few hours ago, normally I do it once every 2weeks.

Alright thanks,
Ill try this out

BlackSHELF said:
Lucky for you I still had copy of it in message box as I got 5-6 requests few hours ago regarding that.
Click to expand...
Click to collapse
I don't see a way to wipe battery stats in stock recovery. Doesn't that mean I have to wipe stats, reboot phone, switch to stock recovery then bootloader drain the phone? Will that reboot adversely effect the rebuilding of the bin file? Can I just delete the batterystats.bin file with root explorer before I power down the phone to start the bootloader drain process?
Edit: I'm at 3%, #push knowledge darinmc GOGOGOGOGOGOGOGOGOGOGO

darinmc said:
I don't see a way to wipe battery stats in stock recovery. Doesn't that mean I have to wipe stats, reboot phone, switch to stock recovery then bootloader drain the phone? Will that reboot adversely effect the rebuilding of the bin file? Can I just delete the batterystats.bin file with root explorer before I power down the phone to start the bootloader drain process?
Edit: I'm at 3%, #push knowledge darinmc GOGOGOGOGOGOGOGOGOGOGO
Click to expand...
Click to collapse
Sorry was asleep but yeah you can manually do it from terminal (su), adb (shell), root exp (enable r/w). Then power down as you saying you reverted back to stock recovery I am guessing you are on 3.0.0.6 supporting the 2.5.1.4 stock. So in that case just reboot and follow the same meth. This would clear out those lag (sticking at 100% for long time and then dropping faster than you can count) and wrong data (exp: 80% after rebooted 83%). I just recalibrated it yesterday which is the reason I spoke about it which caused this whole massive PM attacks and threads like this. Which is fine just do it once every 2weeks or once a month as doing it every week is not particle even for me.

BlackSHELF said:
Sorry was asleep but yeah you can manually do it from terminal (su), adb (shell), root exp (enable r/w). Then power down as you saying you reverted back to stock recovery I am guessing you are on 3.0.0.6 supporting the 2.5.1.4 stock. So in that case just reboot and follow the same meth. This would clear out those lag (sticking at 100% for long time and then dropping faster than you can count) and wrong data (exp: 80% after rebooted 83%). I just recalibrated it yesterday which is the reason I spoke about it which caused this whole massive PM attacks and threads like this. Which is fine just do it once every 2weeks or once a month as doing it every week is not particle even for me.
Click to expand...
Click to collapse
Thanks! Needed to do this for a while.

BlackSHELF said:
Lucky for you I still had copy of it in message box as I got 5-6 requests few hours ago regarding that.
Click to expand...
Click to collapse
thanks for that. I have been searching for that kinda guide on here for awhile! It was like looking for a needle in a haystack there are ten million about it, But none this detailed infomation!

SetCPU can help with your battery life. It did wonders on my HD2 running android.

Some suggestions in this thread: **HOW TO MAKE YOUR BATTERY LIFE LAST** Members Tips & Tricks

can someone clarify the steps "Go into recovery and wipe battery"?
I am running stock rom.
I am able to go into the bootloader menu. But when I select recovery, all i get is an icon with a picture of a phone and a triangle w/ an exclamation point at the corner. I don't know to leave this screen other than battery pull.
Where do I delete batterystats.bin?

Wiping battery stats help
I tried to wipe battery stats after my battery was drained to 1%, but nothing happened. I didnt see any scripts run that confirmed battery stats command had gone through. Was that supposed to happen? I'm really confused by this because I saw that my battery was drained to 1% but when I rebooted to recharge the phone, it showed that I was not fully drained. It read that I was at 20% and charging!? Please help guys. Thanks in advance

longhornguy said:
I tried to wipe battery stats after my battery was drained to 1%, but nothing happened. I didnt see any scripts run that confirmed battery stats command had gone through. Was that supposed to happen? I'm really confused by this because I saw that my battery was drained to 1% but when I rebooted to recharge the phone, it showed that I was not fully drained. It read that I was at 20% and charging!? Please help guys. Thanks in advance
Click to expand...
Click to collapse
Download and use "battery calibration" app from the market. Its pretty easy to understand and follow.
Sent from my HTC Glacier

Thanks man, i greatly appreciate it. I'll download and see what happens

Related

Ive seen 2 ways to recondition battery...which one is the RIGHT way?

So which way is the RIGHT way to recondition the battery?
A. By Sombionix
1. Charge phone completely, leave plugged into power
2. Boot into recovery
3. Wipe battery stats
4. Reboot
5. Remove power cable
6. Drain that sucker all the way
7. Recharge fully
8. Rejoice!"
OR
B. By Someone else (Idk who, sorry if it is you)
1. Let it die completely
2. Charge it completely
3. Wipe battery stats
4. Reboot
5. Your done.
Which way is the right way?
I personally have seen the first one work pretty good on my old MyTouch3G. I have never done this to my Vibrant but like I said, the first option used to work for my other phone pretty good.
Theyre both essentially the same:
Drain to 0
Charge to 100 (while off)
Boot into recovery/wipe battery states (while still plugged in)
Then drain battery again (I don't charge my phone until its 1-3%)
anthonys2r said:
Theyre both essentially the same:
Drain to 0
Charge to 100 (while off)
Boot into recovery/wipe battery states (while still plugged in)
Then drain battery again (I don't charge my phone until its 1-3%)
Click to expand...
Click to collapse
I don't see how they are the same.
Sorry to hijack your thread, but just to clarify.
Does my phone need to be rooted/have a custom rom/modified in any way before I can recondition my battery?
I booted into recovery and couldn't find the option to wipe battery.
vitality said:
I don't see how they are the same.
Click to expand...
Click to collapse
Basic drain, recharge, wipe, drain
Only the first way, the second way conditions, kind of, then erases the stats... :/
JJG2 said:
Sorry to hijack your thread, but just to clarify.
Does my phone need to be rooted/have a custom rom/modified in any way before I can recondition my battery?
I booted into recovery and couldn't find the option to wipe battery.
Click to expand...
Click to collapse
Yeah, I've been looking all over to figure out how to do this. I found this after some searching. I'm going to try this when I get off work.
Found this:
""HOW TO RECONDITION YOUR BATTERY
If your battery seems to drain fast, or if you are changing roms, you might want to try the following to help your battery. Master posted the following instructions (this assumes you have root and clockwork recovery):
1.) Drain your battery to the point it shuts off on it's own..
2.) Plug it in & let it charge over night (While it is still off)
3.) Launch into ClockWork Recovery by holding the "VOL UP", "VOL DOWN", & "Power" release those buttons after you see the second Vibrant screen.
4.) Press "reinstall packages" (It should take you to the Clockwork Mod Recovery screen, If it didn't then press "reinstall packages' again)
5.) Go to "advanced"
6.) Press "Wipe Battery Stats"
7.) Reboot
** I drain my battery to as low as it will go, but not all the way. I also charge it for only about an extra hour max, once it's fully charged. **""
so the only debate is whether battery stats should be reset when the battery is full, or when it's practically empty.
I've never wiped battery stats and never had issues, even switching between batteries on my G1. Just drain till out dies then recharge. I've had it last on 1-2% for a a few hours before, but it always recalibrates its self after the next full charge.
Sent from my SGS Vibrant.
dougstoner said:
Yeah, I've been looking all over to figure out how to do this. I found this after some searching. I'm going to try this when I get off work.
Found this:
""HOW TO RECONDITION YOUR BATTERY
If your battery seems to drain fast, or if you are changing roms, you might want to try the following to help your battery. Master posted the following instructions (this assumes you have root and clockwork recovery):
1.) Drain your battery to the point it shuts off on it's own..
2.) Plug it in & let it charge over night (While it is still off)
3.) Launch into ClockWork Recovery by holding the "VOL UP", "VOL DOWN", & "Power" release those buttons after you see the second Vibrant screen.
4.) Press "reinstall packages" (It should take you to the Clockwork Mod Recovery screen, If it didn't then press "reinstall packages' again)
5.) Go to "advanced"
6.) Press "Wipe Battery Stats"
7.) Reboot
** I drain my battery to as low as it will go, but not all the way. I also charge it for only about an extra hour max, once it's fully charged. **""
Click to expand...
Click to collapse
So are you saying we need to be rooted? To use the clockwork recovery?
Sent from my SGH-T959 using XDA App
Why are you guys insisting on DRAINING before CHARGING and then WIPING stats? The first drain won't do anything and even if it did, you're wiping the stats soon after.
Just charge, wipe, drain, charge. That's it.
where do you guys find the "advanced" and "wipe battery" option? im on a Tmobile vibrant and when i boot into recovery and then reinstall packages, i only get the option to:
reboot system now
reinstall packages
delete all user data
delete cache data
when i click reinstall packages again, it does a scan and says "e: cant open /sdcard/update.zip, Installation aborted"
thnx
J__ said:
where do you guys find the "advanced" and "wipe battery" option? im on a Tmobile vibrant and when i boot into recovery and then reinstall packages, i only get the option to:
reboot system now
reinstall packages
delete all user data
delete cache data
when i click reinstall packages again, it does a scan and says "e: cant open /sdcard/update.zip, Installation aborted"
thnx
Click to expand...
Click to collapse
You need to download clockwork recovery from market and flash the program within the application.
alecjake said:
So which way is the RIGHT way to recondition the battery?
A. By Sombionix
1. Charge phone completely, leave plugged into power
2. Boot into recovery
3. Wipe battery stats
4. Reboot
5. Remove power cable
6. Drain that sucker all the way
7. Recharge fully
8. Rejoice!"
OR
B. By Someone else (Idk who, sorry if it is you)
1. Let it die completely
2. Charge it completely
3. Wipe battery stats
4. Reboot
5. Your done.
Which way is the right way?
Click to expand...
Click to collapse
Just so we're clear "conditioning" the battery is a misnomer. Lithium Ion batteries do not need "conditioning" in the electrochemical sense that say Nickel Cadmium batteries do. What you are doing is calibrating the internal charging systems awareness of battery states.
I've tried either method, and cannot note any significant difference between the two. So long as your starting the calibration with a clean slate and a battery in an effective 0% or 100% state you're effectively establishing a baseline that the software can work with.
masterotaku said:
Just so we're clear "conditioning" the battery is a misnomer. Lithium Ion batteries do not need "conditioning" in the electrochemical sense that say Nickel Cadmium batteries do. What you are doing is calibrating the internal charging systems awareness of battery states.
I've tried either method, and cannot note any significant difference between the two. So long as your starting the calibration with a clean slate and a battery in an effective 0% or 100% state you're effectively establishing a baseline that the software can work with.
Click to expand...
Click to collapse
This.
And since it's a lithium-ion battery, you really shouldn't be draining it to absolute zero, ever. EVER. So if you're going to "condition" do it at 100%
I see so many people on these forums complaining about bad battery life and how they reconditioned their battery 27 times this week.
STOP.
The best thing you can do for your battery is charge early and often.
Sent from my SGH-T959 using XDA App
once battery is drained, instead of recharging it while its in the phone... will it be the same if i recharge the battery seperately, then when its fully charged... slip it inot the phoen and THEN do this again? i have 3 batteries lol
anthonys2r said:
You need to download clockwork recovery from market and flash the program within the application.
Click to expand...
Click to collapse
oic. thnx. Do i need root for that?
How best to "condition" multiple batteries?
masterotaku said:
Just so we're clear "conditioning" the battery is a misnomer. Lithium Ion batteries do not need "conditioning" in the electrochemical sense that say Nickel Cadmium batteries do. What you are doing is calibrating the internal charging systems awareness of battery states.
I've tried either method, and cannot note any significant difference between the two. So long as your starting the calibration with a clean slate and a battery in an effective 0% or 100% state you're effectively establishing a baseline that the software can work with.
Click to expand...
Click to collapse
Thanks for this useful information. I have a desktop charger that charges my two spare batteries, so I don't use the phone to charge the batteries. Given that "conditioning" simply calibrates the phone, would this method help my battery life at all?
J__ said:
oic. thnx. Do i need root for that?
Click to expand...
Click to collapse
Yes, you do.

Battery problem.

My Wildfiire battery doesnt last nearly as long as it did when I first got it.
I have had it with many custom ROM's and 2 RUU's to see if it could be the a software issue but they all do the same.
I have gotten a new battery but does the same.
The only thing is when I install and do all the wipes the battery cache doesnt seem to say its completed and its done that on all the rom's and ruu's.
I am using Rom manager with the lastest clockworkmod.
3G and wifi is always on and has always been that way auto sync is of.
Any ideas ppl?
Would love some help.
cheers
Wow nobody had this problem?
Not me certainly. Battery life actually seems better to me than when I got it, thanks to the CPU Clock setting apps and Custom ROMs.
i've had some problems as well, it stays at 100% for a LONG time and then drops drastically if I'm using mobile data. Try draining fully, boot into recovery and clear battery stats, and then charging full. then don't charge again until dead, after which charge it till its full again. might help.
nhnt11 said:
i've had some problems as well, it stays at 100% for a LONG time and then drops drastically if I'm using mobile data. Try draining fully, boot into recovery and clear battery stats, and then charging full. then don't charge again until dead, after which charge it till its full again. might help.
Click to expand...
Click to collapse
If I drain it fully I wouldnt be able to boot to recovery , I give it a go.
Cheers
confrontation said:
If I drain it fully I wouldnt be able to boot to recovery , I give it a go.
Cheers
Click to expand...
Click to collapse
Actually, when the phone turns off on its own, it still has some juice left, should be more than enough to boot into recovery and clear stats.
nhnt11 said:
i've had some problems as well, it stays at 100% for a LONG time and then drops drastically if I'm using mobile data. Try draining fully, boot into recovery and clear battery stats, and then charging full. then don't charge again until dead, after which charge it till its full again. might help.
Click to expand...
Click to collapse
Done what you said am charging now but charging can take up to 24hours and more its been getting worse and worse....

Battery Issues SOLVED!- New Solution...after I tried many..this works!

Hi all;
so over the last few months i have flashed many custom roms, kernels etc...and always had battery issues...i have tried jugs battery fix, wiping battery stats..following many other battery optimization threads..but i never got the battery life i once had (when i first bought my phone)...
a few days ago my phone totally crashed..wouldnt charge etc..and i ended up having to do a complete restore..i did this by following these instructions
http://www.youtube.com/watch?v=hRFJJFW-XxI
....so from there, i unlocked again, reloaded CWM etc and i loaded 2.3.4 flashable zip (found in the forums) via CWM.
and voila..battery life AMAZING....after 8hours im usually still at 85%...by evening time after using the phone all day im still at about 60%
from here do what you want with roms..
i loaded the alien rom without adding the themes..and the battery life is as stated above..
so if you are having issues try hard resetting the phone then re unlocking the BL and upgrading via cwm to 2.3.4
my battery life i back to amazing.....
p.s. would be great if someone else who is having issues tried this and reported back as well...
p.s. this worked for me but i am not responsible if you mess up your phone!
Erm..
Ok Ill bite >,>
Where are these camera buttons your referring to in this guide of yours Atrix has three hard buttons and four soft buttons power, vol- and vol+ and menu home back and search.... you hard mod a camera button into this already packed phone Ill like to hear it XP
Interesting..
Couple of q's:
- which camera button?
- unlock bootloader again? Once unlocked it stays unlocked.
- I don't understand how doing a reset leads you to unlocking the bootloader again?
Sent from my Motorola Olympus using XDA Premium App.
updated the hard reset instructions to reference a youtube video (not mine but describes how to do it)
http://www.youtube.com/watch?v=hRFJJFW-XxI
it doesn't actually re-lock the bootloader. The BootLogo is replaced with the stock logo, which does NOT include the "UNLOCKED" in the upper left hand corner
sorry i didnt realize that..so skip this step for anyone that is going to try it...
jakew02 said:
it doesn't actually re-lock the bootloader. The BootLogo is replaced with the stock logo, which does NOT include the "UNLOCKED" in the upper left hand corner
Click to expand...
Click to collapse
well dont have the old recovery and even if i did cant read the things at all quality is very bad
me too really can't understand it properly, i need to get back that battery time, but How? can anyone else explain it Please?
Anyone except TC try this with sucess? I have Alien 4 with stock kernel and i am getting about 15 to 20 hours before death.
I could be wrong, but I'm fairly confident that the following information is correct:
Doing a factory reset on the stock android recovery simply wipes data, cache, and dalvik - all of which can be done with any of the after market recoveries.
I am unsure as to whether or not factory reset also wipes the battery stats in the stock android recovery.
Edit: It is highly recommended to wipe the battery stats after you install a new ROM or kernel. To do so the quick and easy way - charge the phone to 100%, reboot to recovery, clear battery, reboot. If is then recommended that you let the phone die (or at least get low) followed by a full charge 2-3 times to make the battery accurate. The most involved way to reset the battery stats is to charge to full with the phone off. When it says 100%, pull the battery, plug it back in, let it charge for an additional hour or two while still off like this. It will likely not show 100% after an hour or two, that's fine. Boot into recovery, wipe stats, start up the phone, then unplug it. Follow this will drains and full charges 2-3 times and you will be set. This helps to fix poor battery life when it is caused by a battery that will not fully charge.
OP you should try to drain the battery down to nothing. A lot of people who screw up their battery stats end up with bad battery, however at times you can get a very slow draining batter that will give you 20 hours with 60% left, and then when the phone hits 53% (random example), the battery will fall from there to dead in just a few minutes. This happened to me when I first flashed Ninja SF. I was amazed the battery until I decided to let the phone actually die.
DK
Well im on Cm7 so far only 48% left after 18 hours of moderate use
Sent from my MB860 using xda premium
hi i did try what you said below and it didnt give me the same results...
DeathKoil said:
I could be wrong, but I'm fairly confident that the following information is correct:
Doing a factory reset on the stock android recovery simply wipes data, cache, and dalvik - all of which can be done with any of the after market recoveries.
I am unsure as to whether or not factory reset also wipes the battery stats in the stock android recovery.
Edit: It is highly recommended to wipe the battery stats after you install a new ROM or kernel. To do so the quick and easy way - charge the phone to 100%, reboot to recovery, clear battery, reboot. If is then recommended that you let the phone die (or at least get low) followed by a full charge 2-3 times to make the battery accurate. The most involved way to reset the battery stats is to charge to full with the phone off. When it says 100%, pull the battery, plug it back in, let it charge for an additional hour or two while still off like this. It will likely not show 100% after an hour or two, that's fine. Boot into recovery, wipe stats, start up the phone, then unplug it. Follow this will drains and full charges 2-3 times and you will be set. This helps to fix poor battery life when it is caused by a battery that will not fully charge.
OP you should try to drain the battery down to nothing. A lot of people who screw up their battery stats end up with bad battery, however at times you can get a very slow draining batter that will give you 20 hours with 60% left, and then when the phone hits 53% (random example), the battery will fall from there to dead in just a few minutes. This happened to me when I first flashed Ninja SF. I was amazed the battery until I decided to let the phone actually die.
DK
Click to expand...
Click to collapse

Y u no sleep? help me, thanks.

Hello, i'm currently with quarx CM10 last build (2 nov). First time i installed it i noticed it help A LOT with battery consumption.. from 12 midnight till 10 am from the other day it went from 99 to 97... that is.. like a miracle. then i did something stupid.. i used "battery calibrator" and it ruined it. Today it wen from 12 to 10 am in the morning with 99 to 60 then 49 (typical battery jump)...
I repeat, it's in the night, were wifi is off, refresh is off and nothing (that's what i'm planning to discover) is running or updating.
I attach some screens.
1) first install of the new rom. you can see it sleeps like a baby.... plain.
2).. goes down.. and down... even though i'm not using it.
any comments, help or suggestions? thanks in advanced!
missgothika said:
Hello, i'm currently with quarx CM10 last build (2 nov). First time i installed it i noticed it help A LOT with battery consumption.. from 12 midnight till 10 am from the other day it went from 99 to 97... that is.. like a miracle. then i did something stupid.. i used "battery calibrator" and it ruined it. Today it wen from 12 to 10 am in the morning with 99 to 60 then 49 (typical battery jump)...
I repeat, it's in the night, were wifi is off, refresh is off and nothing (that's what i'm planning to discover) is running or updating.
I attach some screens.
1) first install of the new rom. you can see it sleeps like a baby.... plain.
2).. goes down.. and down... even though i'm not using it.
any comments, help or suggestions? thanks in advanced!
Click to expand...
Click to collapse
Make your phone recalibrate the battery. Follow the following steps:
1 Use the phone till you have 10% or less battery left.
2 Wipe battery stats from 2ndinit recovery.
3 Boot into CM10.
4 Charge your battery to 100%.
Doing this will make the phone generate a new battery stats file and should solve your problems.
krushnam said:
Make your phone recalibrate the battery. Follow the following steps:
1 Use the phone till you have 10% or less battery left.
2 Wipe battery stats from 2ndinit recovery.
3 Boot into CM10.
4 Charge your battery to 100%.
Doing this will make the phone generate a new battery stats file and should solve your problems.
Click to expand...
Click to collapse
i'll try that. but already done it when installed the last build for the second time. i do wipe cache / dalvik / batt stats then flash ROM and all over again with the wipes.
missgothika said:
i'll try that. but already done it when installed the last build for the second time. i do wipe cache / dalvik / batt stats then flash ROM and all over again with the wipes.
Click to expand...
Click to collapse
If you've uninstalled your battery calibrator app or if you've not used it after the wipe, then you shouldn't have any abnormal battery drain...
If wiping battery stats doesn't work, then most people recommend reflashing the ROM, but you've already done that, so you shouldn't have the battery drain now.
Just put your phone to sleep for a few hours, and let's see what happens after doing that.
This is what i did after seeing the sudden drop the other night:
- let it drain normal till the day finishes (at midnight, that's when i did the following)
- charged the battery to 100% and turn off phone.
- pull battery., connect charger to wall and recovery.
- install ROM without battery on. Wipe cache, dalvik, stats batt, install rom, wipe cache, dalvik and statts (again)
- boot into cm10, turn off screen and went to sleep.
- THIS morning, i saw it drained me up to 60 all night.
...
so as you can see.. i've already seen that after reflashing nothing has happened.
no, i didn't use again the calibrator.
missgothika said:
This is what i did after seeing the sudden drop the other night:
- let it drain normal till the day finishes (at midnight, that's when i did the following)
- charged the battery to 100% and turn off phone.
- pull battery., connect charger to wall and recovery.
- install ROM without battery on. Wipe cache, dalvik, stats batt, install rom, wipe cache, dalvik and statts (again)
- boot into cm10, turn off screen and went to sleep.
- THIS morning, i saw it drained me up to 60 all night.
...
so as you can see.. i've already seen that after reflashing nothing has happened.
no, i didn't use again the calibrator.
Click to expand...
Click to collapse
I'm not 100% sure, but as far as I remember, the battery stats gets generated while CHARGING a drained battery.
That's why you should drain the battery, wipe stats and THEN charge it to 100%. As it charges, the battery sensor detects levels (15, 30, 60 and such I think) and generates the battery stats based on these readings.
Afterwards, based on these stats, it generates a reading of battery drain, as the battery sensor itself senses only certain levels.
So, drain, wipe and THEN charge. Do this and let me know if the problem still persists.
krushnam said:
I'm not 100% sure, but as far as I remember, the battery stats gets generated while CHARGING a drained battery.
That's why you should drain the battery, wipe stats and THEN charge it to 100%. As it charges, the battery sensor detects levels (15, 30, 60 and such I think) and generates the battery stats based on these readings.
Afterwards, based on these stats, it generates a reading of battery drain, as the battery sensor itself senses only certain levels.
So, drain, wipe and THEN charge. Do this and let me know if the problem still persists.
Click to expand...
Click to collapse
hmmm! never tried that!.. i was just charging it and it's in 90.. so i'll let it drain and tell you later thanks for that suggestion.
Still open to other comments though thanks to everyone who reads this.
https://plus.google.com/u/0/105051985738280261832/posts/FV3LVtdVxPT
Just read and engrave to your memory folks! Battery calibration never ever had a positive effect on the battery life and the battery usage shown in the android in-built "Battery Use"-app... and by the way, the stats are reset every time you unplug your nearly fully charged phone from the cable.
Hey, rather than blaming your battery stats I'd search for a process running all the time. Looks like something is keeping the phone awake.
The battery calibration IS A MYTH, as explained here, so don't waste your time wiping the values in Recovery. If you don't find any hyper-active processes with the following procedure, the drops might be related to a worn battery (I don't know how old your phone/battery is).
Open a terminal console and type:
$ top -n 1|head
(if you don't have Hacker's Keyboard installed and selected as Input Method you might need to copy and paste the line above, off course without the dollar sign).
Look at the processes listed as output and paste them here.
slimshady76 said:
Look at the processes listed as output and paste them here.
Click to expand...
Click to collapse
Hola slim , thanks for answering. here's the screen
You had it coming since you are using Swipe... It's chewing up your CPU, and consequently your battery. Search the site. Off the top of my head I think it was a common issue.
slimshady76 said:
You had it coming since you are using Swipe... It's chewing up your CPU, and consequently your battery. Search the site. Off the top of my head I think it was a common issue.
Click to expand...
Click to collapse
Swype? really?? shoot.. i love it.. even though i don't use it that much. Searched a bit but couldn't find much. Gonna try freezing it and see what happens. thanks.
Finally i managed with your help to accomplish some good sleep! here's the screen. i think it's awesome, never ever seen this.
thank you!!
we'll see if it gets better.
There's an interesting lesson to be learned here: if no deep sleep can be achieved, don't blame the ROM, and look for a stubborn process which refuses to stop when the kernel tell is to.

Massive Battery Drain in 4.4.2

Does anyone else have a massive battery drain in Kit Kat? I can charge my Nexus to 100% and in an hour or two it's completely dead with blinking red light. I tried restarting to bootloader when it was at 5% but it was still on for like a half hour. Once I restarted my phone, my battery read 0%. I'm thinking it may be time to change the battery if no one else is having this problem.
I suggest you to reset the battery stat from the recovery. The probability that this works are low but is better then nothing.
How do I do that from recovery?
Edit: phone was charged to 98%, rebooted into recovery to see if I could wipe stats in TWRP, rebooted again, phone reads 28%, 3 minutes later it read 66%.
TheKnux said:
How do I do that from recovery?
Edit: phone was charged to 98%, rebooted into recovery to see if I could wipe stats in TWRP, rebooted again, phone reads 28%, 3 minutes later it read 66%.
Click to expand...
Click to collapse
To wipe battery stats in TWRP:
boot into TWRP recovery
/advanced/File Manager/
folder /data/system/
click batterystats.bin
click Delete
reboot system
If you can't see the folder, you need to mount the data folder.
Well I switched to Philz Touch, do I have to do the same thing then?
TheKnux said:
Well I switched to Philz Touch, do I have to do the same thing then?
Click to expand...
Click to collapse
You should have the wipe battery stat under advanced in your recovery.
The right step to follow are:
1. charging the battery FULLY
2. wipe Battery Stats
3. don't charge the device until the battery still turns off your device because it empty
4. now again FULLY charge without interruption
Wiping battery stats does nothing, see here: http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/ . Sounds like your battery is borked. May need to send away for repair. Are you still under warranty?
ScumDroid said:
Wiping battery stats does nothing, see here: http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/ . Sounds like your battery is borked. May need to send away for repair. Are you still under warranty?
Click to expand...
Click to collapse
Yeah I figured. Thought it was a KitKat bug at first but then it started getting ridiculous. Phone was at 70%, started taking a photosphere, phone shut off, and when I turned it back on it was at 3%.
No its not. Bought it off Craigslist. Just gonna order a battery off eBay for $18 and replace it myself, see if that fixes anything.
I just got out of a similar problem.
My battery percentage was jumping all over the place.
It would charge fully in about 5 mins, and die in about 20.
Everytime I restarted the phone, it would read a different percent.
I ended up running the phone on full brightness, with like everything turned on to drain the battery all the way down.
& Everytime it would shut off cause it had no battery left, just restart it and keep draining it until when you reboot the phone it no longer turns on(because the battery if fully drained of course).
That's when it is really dead.
Then just charge it to 100%, and keep it charging for about 20 extra minutes once it hits 100%, and now it's back to normal!
Glorifyy said:
I just got out of a similar problem.
My battery percentage was jumping all over the place.
It would charge fully in about 5 mins, and die in about 20.
Everytime I restarted the phone, it would read a different percent.
I ended up running the phone on full brightness, with like everything turned on to drain the battery all the way down.
& Everytime it would shut off cause it had no battery left, just restart it and keep draining it until when you reboot the phone it no longer turns on(because the battery if fully drained of course).
That's when it is really dead.
Then just charge it to 100%, and keep it charging for about 20 extra minutes once it hits 100%, and now it's back to normal!
Click to expand...
Click to collapse
That really worked? Any problems with it since and is this a common issue with the N4? For some reason it won't die when it's in the bootloader even though the percentage read 5.
So yesterday it was so dead that it gave me the red blinking light, should I charge it when that happens again and should I leave it off while charging it or turn it on and not touch it?
How many times did you have to do this until it straightened itself out?
TheKnux said:
That really worked? Any problems with it since and is this a common issue with the N4? For some reason it won't die when it's in the bootloader even though the percentage read 5.
So yesterday it was so dead that it gave me the red blinking light, should I charge it when that happens again and should I leave it off while charging it or turn it on and not touch it?
How many times did you have to do this until it straightened itself out?
Click to expand...
Click to collapse
I am currently having WakeLock problems, but I do not beleive this was the cause.
I was able to restart it after it died about 4-6 times, till it was fully dead.
Then I charged the phone, and kept it off the whole time.
I installed wakelock detector to make sure that wasn't the problem. I had this problem on the stock rom even before I rooted. So the problem hasn't persisted since?

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