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Battery 100% fix by kernal

This kernal will make the nexus s charge to 100% with the screen off, thanks to peter alfonso, I have tried it and it works great with good battery life.
www.peteralfonso.com/2011/11/download-nexus-s-263514-kernel-update.html
Sent from my Nexus S using XDA App

It's not a fix, number is just cosmetic your nexus will still charge to 96%... It's just a tweak

dinuweera said:
This kernal will make the nexus s charge to 100% with the screen off, thanks to peter alfonso, I have tried it and it works great with good battery life.
Sent from my Nexus S using XDA App
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If I'm not mistaken, the "charge to something about 96%" is a safety measure to increase the lifetime of the battery? Why would one want to push those last few % and lower the lifetime?

dinuweera said:
This kernal will make the nexus s charge to 100% with the screen off, thanks to peter alfonso, I have tried it and it works great with good battery life.
www.peteralfonso.com/2011/11/download-nexus-s-263514-kernel-update.html
Sent from my Nexus S using XDA App
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most the other kernels include it now also. and it is just a cosmetic fix.

I just don't understand if it's such a safety features why does NO other phone do it?
Sent from my Nexus S using xda premium

Other phones should do it... Just like why you shouldn't keep your laptop constantly plugged in... It'll kill your battery a lot faster
Sent from my Nexus S 4G using xda premium

Battery works great but first error is NFC not working ...

lilgrass71 said:
Other phones should do it... Just like why you shouldn't keep your laptop constantly plugged in... It'll kill your battery a lot faster
Sent from my Nexus S 4G using xda premium
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All Android phones have this "charging safety feature".
Unless you plan on using the same battery and phone for the next ten years, you are highly unlikely to notice any degradation in the battery health. I have been using one of my OEM Samsung Nexus batteries for 2 years now (it is the same battery that came with my Samsung Moment and used on an Instinct HD as well). This particular battery has been topped off on all three phones and external chargers probably 100's of times. It still charges to a full 4.19v and stays full even sitting on my nightstand for a week or two.
The "Safety mechanism" in the charging code that has been brought up over and over again is included in all Android phones. It is nothing new. The problem is that in other devices, the battery meter reads 100% when it reaches the safe full level at the batteries temperature (usually between 4.188 and 4.190). The Nexus S has an error in the driver code that causes the meter to read inaccurately(95-98%) even when the voltage reaches 4.19. I don't believe Google did this intentionally, as it would cause many misinformed people to constantly bump charge their batteries in hopes of reaching 100%. It would have made more sense to have the meter read 100% at the safe full level.
In any event, the fix for the issue is here, and already being applied to some Nexus S kernels, including the one in the OP. It's not just "cosmetic".
https://github.com/pawitp/android_ke...cb36c33c2c3234

Bought my nexus s day one and it charges to 93%. I've noticed turning wifi on after plugging it in to charge does boost it to 98. But I always leave wifi off overnight. Don't want pesky google plus emails waking me up lol.
Overall, after nearly a year of use I'm happy with the battery life of my phone. You get used to how far you can push the phone in daily use and which settings to use.
Sent from my Nexus S

Battery charging issue (or not?!? )

Hi guys. Ive just got myself a nexus 7, my first android tab!
Ive searched around for the issue and found similar problems but none exactly the same!?
I plug my nexus in, and nothing happens. It says and does nothing.
Ive tried my ipad charger, different cables, and nothing.
Ive checked my the battery info on the settings however, and it says it is not charging, even though according to the chart it is, albeit a tad slow (putit on charge at around 40%,at around 5.00-5.30, its now 9.30 at 98% and still rising)
If i turn it off the battery charging symbol(s) come up.
Is there any fixes? Ive tried 4-5 different cables, 2 chargers, all the same.
Its not put me off android tabs or anything, the tab so far is mint and is alot more fun than my ipad!!

Try flashing a new ROM or flash the factory image from Google, tbh it doesn't seem like a major problem, its just an issue with the battery animation in the status bar.
Also you should use the proper charger, not sure of the output on the iPad charger but this one is 2.0a whereas my gnex charger is 0.7a.
Sent from my Nexus 7 using xda premium

nodstuff said:
Try flashing a new ROM or flash the factory image from Google, tbh it doesn't seem like a major problem, its just an issue with the battery animation in the status bar.
Also you should use the proper charger, not sure of the output on the iPad charger but this one is 2.0a whereas my phone charger is 0.7a.
Sent from my Nexus 7 using xda premium
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Thanks! Im gonna try wiping it shortly i am using the asus charger now, and the ipad charger is the same output as the asus one! (ipads have beefier chargers than the phones)
Im not too fussed as most of the time ill leave it to charge overnight anyway. Its up to 100% too now, only really a 5hr first charge?!

OK that'll probably sort it for you and if not then flashing a factory image is pretty straightforward and puts it back to basic stock everything fresh and new.
ah OK that's good to know about the iPad charger!
Sent from my Nexus 7 using xda premium

nodstuff said:
OK that'll probably sort it for you and if not then flashing a factory image is pretty straightforward and puts it back to basic stock everything fresh and new.
ah OK that's good to know about the iPad charger!
Sent from my Nexus 7 using xda premium
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Is there a way to recover without a pc per chance? Im on my holidays lol! I dont have cwm on so im guessing not

wkdcal said:
Is there a way to recover without per chance? Im on my holidays lol! I dont have cwm on so im guessing not
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Not really, but its not a problem worth fretting over, just do it once you get home. It still charges so its just an aesthetic issue really.
Don't worry about it.
Sent from my Nexus 7 using xda premium

Looking for advice regarding my battery life after 4.2.2.

Hey I've searched for help on the subject all over and. I'm not seeing anyone with this problem, on the contrary everyone seems to be doing better.
Anyway I got the OTA update to 4.2.2 from the. General forum a few days ago and flashed it without much consequence and everything seemed fine. I reaquired my root but I have noticed my battery is losing charge way too fast doing light browsing and use.
Checking battery use I got 2 hours of screen time with 30% of the battery and again this has been simply browsing sites with pure text. As I'm writing this it went from 70% to 68%
To list a few key things that have happened that might be important and I'm hoping anybody can help or give advice.
1) I stupidly forgot to wipe cache and dalvik before and after flashing the update, when I remembered I went to recovery and did this
2) I rerooted
3) On Friday I fell asleep using it and when I woke up it was completely drained, honestly I don't even remembered what I was doing cause I had a bit too much wine but I think I was playing an emulator and when I woke up it wouldn't even turn on so I charged it back to 100%
As I write this now I think back and problem seems to have started then.
I tried re flashing a backup, which didn't help and I flashed franco kernel reading it gave good battery.
My last idea is simply reverting back to stock and see if it helps but before that I wanted to check some opinions or advice here.
PS I have already used BBS and its finding nothing wrong in wakelocks or use (except something called AudioOut2)
As I finish this im down to 66%, definitely not normal.
Any help is appreciated.
Sent from my Nexus 7 using Tapatalk HD

Having the same problem.
Didn't even make it to work and was below 50%. Weird.
Sent from my Nexus 7 using xda app-developers app

Did you at some point let it drain completely to 0% after updating to 4.2.2?
If nobody has any idea ill just go back to stock and report results.
Sent from my Nexus 7 using Tapatalk HD

Well if anybody has a similar issue or cares, going back to stock seems to have fixed the issue. Regardless I did some light testing on the battery. It shows marginal better perfomance on 4.2.2
By switching Kernel there was no change it seems but then again the test only covered two activities perhaps with further comparissons better results would be gotten.
But long story short if anybody has this problem apparently going back to stock is the way to go.
I'll keep a careful eye on the battery and gauge on regular use and if it happens again have a better idea of what caused it.

Its a program that's running or not completely shutting down.
Torrent was my issue. Uninstalled rebooted and then reinstalled.
My battery life is good now.all day and still over 80%.
Sent from my Nexus 7 using xda app-developers app

twyztyd said:
Its a program that's running or not completely shutting down.
Torrent was my issue. Uninstalled rebooted and then reinstalled.
My battery life is good now.all day and still over 80%.
Sent from my Nexus 7 using xda app-developers app
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Well I have encountered a completely new problem lately.
In the last week this has happened 3-4 times. I leave it charging or simply on deep sleep for a while and when I try to turn it on it won't, I'm not sure if its shutting down since when I plugged it in (thinking battery had drained) not battery charging animation came up, instead I left the power button pressed and it came up with whatever charge it had.
Not sure if its a side effect of the original problem of the battery discharge or something to do with torrent clients as 3 of the total times it has happened I was downloading something and left it running.
Not sure what to do at this point since I find no info on this or it happening to anybody else. What I find are things like it not charging etc which really arent my issues.
I will avoid using torrents on it for a few days and see if it happens again, if it does I will seriously have to consider contacting Google or Asus since this device doesn't even have 90 days in my possession yet.

If anyone is following this (really just posting here to help anybody who finds the same problem and as a sort of journal) I found this post on the kernel im running thread
http://forum.xda-developers.com/showpost.php?p=38422891&postcount=4603
Somebody replied to that post stating its a 4.2.x problem
It could also be a kernel problem with torrents as further down the posts another person complains about the same happening when using a bittorrent client
I'll post with whatever I find out.

I've been having the same problem glad to see it isn't just me.
Sent from my Nexus 7 using XDA Premium HD app

Hi Chaps, Since my upgrade to 4.2.2 I thought the battery life was great. It stayed at 100% for ages and when I was streaming music for a few of hours and the battery only went to 96%. Superb I thought..
But, yes there is a but. My N7 now shuts down when the battery is at 32% and I need to charge it to get it to reboot as it is well drained. Is it possible to zero the battery indicator or recalibrate it for an accurate reading? TATA R.
Sent from my Nexus 7 using xda app-developers app

robertsmith1873 said:
Hi Chaps, Since my upgrade to 4.2.2 I thought the battery life was great. It stayed at 100% for ages and when I was streaming music for a few of hours and the battery only went to 96%. Superb I thought..
But, yes there is a but. My N7 now shuts down when the battery is at 32% and I need to charge it to get it to reboot as it is well drained. Is it possible to zero the battery indicator or recalibrate it for an accurate reading? TATA R.
Sent from my Nexus 7 using xda app-developers app
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Battery calibration, which should be done rarely, is merely a matter of putting your device through one complete charge/discharge cycle. Don't waste your time with battery calibration apps, as they are 100% snake oil. Likewise, you can disregard any misinformation about wiping battery stats, as that has absolutely no bearing on battery charge indication.
Try unplugging your battery for a few minutes, and then plug it back in, ensuring that the connector is firmly seated.

Getting pissed off here. N7 shuts down at 42% now. WTF. Is this a 4.2.2 problem? If so how do I revert back to an earlier version?
Sent from my Nexus 7 using xda app-developers app

Mine is ****ing **** since 4.2.2 and its official, writing this it went from 40 to 37 the ****
Sent from my Nexus 7 using xda app-developers app

I am seeing reduced battery life on 4.2.2...
I used to be able to go all day on a charge. Now I can't make it through the evening ...
I know that is subjective as I didn't indicate my prior usage compared to my current usage pattern.
But my perception is that battery life has degraded ...
As an aside, I noticed that an el-cheapo IKEA power strip didn't provide enough juice to keep the battery from draining further while using it when plugged in...
It plugged in at 20% and kept using the N7... awhile later I was in the mid-teens.
I don't use that power strip any longer....
Sent from my Nexus 7 using xda app-developers app

[Q] Nexus 4 Battery drops

Having some really strange problems with my Nexus 4 battery. Sometimes my phone will completely drop out at a reasonable percentage, and be completely dead. Now lately, my phone will say 100% but after a reboot, it will say something like 50%.
I loved this phone but somehow after the OTA 4.3 update things started getting seriously messed up.
A lot of times I have Android System, and Android OS (and sometimes mediaserver as well) as leading battery drainers.
I don't understand what is going on with my phone. To fix this I rooted and flashed over Sentinel Rom because it was noted for good battery life.
But the problems from before still persist.
Here are some screenshots of what I'm finding. Please any help would be nice.
My last guess would be this is something hardware related. Could this be a battery issue? Or a wire issue?
I have opened my Nexus 4 previously.
This is driving me ballistic. I love this phone but it needs to last me a bit longer.
Thanks for all your help, lets get this fixed!!

There are some users reporting same behavior and that replacing the buttery fixed their issue.
Sent from my Nexus 4 using xda app-developers app

Try calibrating the battery completely drain your phone then fully charge it
Sent from my Nexus 4 using XDA Premium 4 mobile app

Have you solved using that method suggested? Anyway it's strange a battery lasts only a year -.-

[Q] Fault battery indicator [SOLVED]

Hello, :fingers-crossed:
i'm having a lot of troubles with the battery of my Nexus 4. I'll try to explain this strange situation...
Few days ago i noticed a ridicoulous battery drain while i was, as usually, listening to some music with my bluetooth A2DP headset Jabra HALO2. It was something like 1% every less then 1 minute. At first i thought it was due to a recently upgrade to CM10.2M1 (which is a monthly build of Cyanogenmod on 4.3) or due to a 5 minutes fast charge from the 2A charger of Nexus 10 that could have "upset" the battery.
At first i started focusing on the software side problem; i tried CM10.2RC1, CM10.2, stock 4.3, stock 4.4 and now CM11M1, and, while doing all of those wipes, i noticed that not only the discharge was insanely fast, but even the charge! The graph on the setting panel is almost vertical while cahrging, like 3% to 40% in 25 minutes.
But that's not all, sometimes, after rebooting, i noticed a battery level different from the previous boot, so i decided to wait a full discharge and then fully recharge it. I have waited the 0% (not so much time ) putting the screen always on and the LED flash too, then, i tried few times to turn it on and every time, after the boot screen disappeared it immediately started to turning off due to 0% battery.
Moreover, for being certain, i tried to turn it on in recovery and wait how much time it would take to consume the lasting charge on the battery. Surprisingly, after 30 minutes it was still there! I tried a reboot into system, showing me a 10% remaining battery (WTF), which discharged to 0% in like 3 minutes. Now i'm waiting the whole night the real discharge in recovery with screen always on, hoping that a full recharge could fix it. I would like to evidence that the phone do not overheat during both charghe and discharge, so i guess the battery itself may be ok.
I'm still not sure if it's a software problem, and i'm worrid if it could be an hardware related issue. Maybe it could have been the charge from the 2A adapter.
I really don't know what to do next. Someone knows how to help me?
Here 2 screenshoots, I wasn't able to upload it normally so here the links:
https://drive.google.com/file/d/0ByucdM-SwPNnMlFUOGU4bXkzaGs/edit?usp=sharing
https://drive.google.com/file/d/0ByucdM-SwPNnZEtXczNuTXhiMGc/edit?usp=sharing
EDIT:
I've done a full discharge until even the full hybernation has been shutted down, but seems that it hasn't solved anything. I've also noticed that in the battery stat is missing the display consumption (WTF?!?). Maybe it's a CM11M1 bug, it happen even to my Nexus 10. Here other shots:
https://drive.google.com/file/d/0ByucdM-SwPNnazVacUNZeEZkUlk/edit?usp=sharing
https://drive.google.com/file/d/0ByucdM-SwPNnRHU2QlJibk5TVVE/edit?usp=sharing
EDIT:
As happened to the N10, after a while the display appear in the stats:
https://drive.google.com/file/d/0ByucdM-SwPNnMEozbzNRVGdzSHc/edit?usp=sharing
EDIT:
I've noticed just now that while I was waiting a real full discharge of the battery the TWRP couldn't show me the battery percentage. Really strange...
[SOLVED]
In summary, the problem was the combination of kernel+ROM. The CM with his kernel on N4 was consuming tons of electrons. I tried Purity+Hellscore, now i reach few days of low usage and one and half of medium usage

How old is your phone? You might be able to get a replacement from Google under warranty.
Sent from my Nexus 4 using xda app-developers app

I don't think it'd be the 2A charge, I use the 2A charger on my battery all the time.
Sent from my Nexus 4 using Tapatalk

EDITed main post!
sshark said:
How old is your phone? You might be able to get a replacement from Google under warranty.
Sent from my Nexus 4 using xda app-developers app
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It have 9 months, and yes is still under warrenty, but I've bought it in Spain, and I live in Italy. I think this will be hard to solve

I have some strange problemi too.
Sometines the phone reboot itself and the battery drops (i tried to flash all stock: recovery, bootloader,ROM ecc..)

It could be a faulty battery.. Read this topic, it looks like you have the same kind of problems.
Do you also have simlocks/loss of network connection?

EDITed main post!
Faeshaas said:
It could be a faulty battery.. Read this topic, it looks like you have the same kind of problems.
Do you also have simlocks/loss of network connection?
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I've already read this topic, i think the source of the problem may be related with mine, but symptoms are different. It is strange that this happened 9 months later!

Gully discharging the phone, rebooting, discharge again if any, reboot. Connect charger, charge full. Reboot, charge full again if any, reboot. This always worked for me.
You can also try to fully discharge, completely power off the phone and let it fully charge while powered off ( only a white battery should be shown on the display).
Sent from my Nexus 4 using xda app-developers app

I'm having the same issues with my phone.
Sent from my Nexus 4 using xda app-developers app

Oxious119 said:
Gully discharging the phone, rebooting, discharge again if any, reboot. Connect charger, charge full. Reboot, charge full again if any, reboot. This always worked for me.
You can also try to fully discharge, completely power off the phone and let it fully charge while powered off ( only a white battery should be shown on the display).
Sent from my Nexus 4 using xda app-developers app
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Already done, nothing....

Did all of u found the problem? Cause it seems i have the same...
Sent from my Nexus 4 using XDA Premium 4 mobile app

Amiramac said:
Did all of u found the problem? Cause it seems i have the same...
Sent from my Nexus 4 using XDA Premium 4 mobile app
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Unfortunately, no. Probably it is a battery related problem, i'm going to replace it and see what happen. In the meantime not even PurityROM+HellsCore kernel may handle this battery draining...