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OTA 2.3.4 Upgrade - Battery Issues

So I have had the OTA upgrade on my phone for the past few days and the battery life has gotten unbelievably bad. I'm so confused because it seems to have helped a lot of peoples batteries. I have not changed any habits at all and can barely get through the morning. I'm losing 20% just on the 25 minute train ride to work.
Any ideas?

I'm on the same boat as you I hope we can get a helpful answer.
Sent from my HTC Sensation 4G using XDA Premium App

Still no improvement. There have to be more than just 2 people that have experienced something this drastic. I have made absolutely NO changes other than the update and the battery life is absolutely pathetic --- like 3-4 hours pathetic.
And no I have nothing synching.

ark2612 said:
Still no improvement. There have to be more than just 2 people that have experienced something this drastic. I have made absolutely NO changes other than the update and the battery life is absolutely pathetic --- like 3-4 hours pathetic.
And no I have nothing synching.
Click to expand...
Click to collapse
That isn't good at all...may I suggest an extended battery? This is my battery stats for today thus far. I have a chichitec battery. I have 13 widgets, 3 email accounts, and a twitter account syncing every couple of hours.
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ark2612 said:
Still no improvement. There have to be more than just 2 people that have experienced something this drastic. I have made absolutely NO changes other than the update and the battery life is absolutely pathetic --- like 3-4 hours pathetic.
And no I have nothing synching.
Click to expand...
Click to collapse
I'm no expert, but perhaps it'd be worth installing an app that monitors CPU usage. I remember having such battery problems with the Desire HD and it came down the the CPU constantly running at 100%. Perhaps you have an app that took a dislike to the update?
Just a thought...
Craig.

This is my situation also. Battery is the worse battery of any smartphone I've owned, since the update. No root, nothing. I'm either too lazy or not savvy enough to pinpoint this down, as far as apps, what is syncing, how often, blah blah. All I know is I am using it as little as possible b/c of the battery. I have had it 8 days, and REALLY need to call Cust Serv asap so I can get a replacement and see what happens, but I just don't want to go through the hassle of them trying to troubleshoot the phone. I'm also experiencing the HTC Sense reloading when exiting out of apps, and a few other small bugs/glitches, like web pages jumping/skipping around when I am scrolling through them. Sorry to unload on this thread I know it's about battery...

Same problem, but my battery get way way way too hot. All that energy loss getting hot is killing my battery. It gets up to 50+ degrees C. Way to hot and ever since using these 2.3.4 ROMs.

Try calibrating the battery.

You guys also might have gotten a bad battery. I'm pretty sure if you call HTC they'll send you one free if you tell them the battery overheats.

aNYthing24 said:
You guys also might have gotten a bad battery. I'm pretty sure if you call HTC they'll send you one free if you tell them the battery overheats.
Click to expand...
Click to collapse
This would make perfect sense if I didn't have my phone from the initial launch day at Walmart and the battery had been great for me UNTIL the upgrade. It's not the battery's fault.
And yes, I have recalibrated. And no, synching is not the issue since everything is the same from prior to the upgrade.

Actually you do need to recalibrate the battery. I had really bad battery life after the ota upgrade, spare parts app and wiping battery stats and now much better battery life than before ota. I have 64% at the moment, unplugged at 7:30am. I used to get 8 hours to a charge right after ota
Sent from my HTC Sensation 4G using xda premium

Before the Update, my battery life was great, except that occasionally I'd wake my phone up to a Battery meter showing a big grey !, instead of the color-coded indicator. A quick glance online said there was something possibly wrong with the battery, or that it was an unsupported 3rd-party battery
After the update, the battery will suddenly decide its ~70% lower than it was several minutes before, and shut itself down. I had to take the battery out, then put it back in, before the phone would recognize that the battery was actually still mostly charged.
The warning symbol mentioned above was infrequent enough, I could believe it wasn't noticed by everyone having these troubles. I think there's simply something wrong with the batteries, but since the 2.3.4 update, the phone treats the problem differently

kponti said:
Actually you do need to recalibrate the battery. I had really bad battery life after the ota upgrade, spare parts app and wiping battery stats and now much better battery life than before ota. I have 64% at the moment, unplugged at 7:30am. I used to get 8 hours to a charge right after ota
Sent from my HTC Sensation 4G using xda premium
Click to expand...
Click to collapse
How did you use "Spare parts"? I downloaded it and I can't find where to wipe the battery stats. I pick battery history and it tells me I'm using gingerbread ROM which does not contain battery stats reporting activity.

An app could be playing up. I know it's annoying but you could try a factory reset and reinstall everything from scratch. I find this helps tame apps that misbehave.
If your phone was fine prior to the update it's unlikely its a battery/hardware issue.

lianw said:
Try calibrating the battery.
Click to expand...
Click to collapse
+1, your battery stats got wiped from the update, so you need to do a few complete charge to 0%'s.
Sent from my HTC Sensation 4G using Tapatalk

rosedog said:
How did you use "Spare parts"? I downloaded it and I can't find where to wipe the battery stats. I pick battery history and it tells me I'm using gingerbread ROM which does not contain battery stats reporting activity.
Click to expand...
Click to collapse
If I remember correctly from my n1,, spare parts was for rooted phones
Sent from my HTC Sensation 4G using Tapatalk

Add me to the list of people whose battery life died after the upgrade. I even tired a factory reset over the weekend to no avail. I also tried switching batteries from another Sensation that I have which wasn't being used but no luck there either. In my mind it definitely is a software issue. And to think I used to brag about this phone's battery life!
I just need to root this thing and move on. Was hoping the HTC root process would come out soon. The instructions make rooting HTC's seem more complicated than my Samsung Vibrant which was pretty simple.

How do you calibrate the battery? lawl

If you're rooted, you can download an app called Battery Calibration that will help with calibrating the battery.
Otherwise, basically run your phone up to 100%, then drain it down to 0 until it shuts off, then recharge it back to 100%. Do this several times over the course of a few days and it should be calibrated.

Been experiencing the same thing. Finally got around to checking wakelock, and found that HTC sense had wakelocked the phone for 9 hours (the awake bar in system settings was solid). Some quick googling suggests that in certain cases, the HTC Sense sync can do this, so our common denominator may be that we all have a sense account set up.
I've disabled sense in my accounts, and killed the sense service. We'll see if that "fixes" it.

Battery damaged?

I have an Problem with my battery, when i have full charged it, it stays some hours at 100% and current widget tells me about 250mA on standby. It was only active when screen was on,after a night it still hast 100%.I tryed leedroid and coredroid after a superwipe ,did calibration several times and tryed the Last 2 Radios with matching rils. Someone with the Same Problem? Or a solution? ;-)
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Sent from my HTC Sensation Z710e

The current widget doesn't work properly on Sensations.

This is how the phone works. First percent drop takes quite a while.

Battery Monitor Widget. Has fix for Sensation's battery meter.
Sent from my Bricked Energy ROM Sensation.

+1
Gunkk said:
Battery Monitor Widget. Has fix for Sensation's battery meter.
Sent from my Bricked Energy ROM Sensation.
Click to expand...
Click to collapse
Battery calibration is your best shot

Battery Monitor widget Shows me ~15 mA when i use the phone...
Sent from my HTC Sensation Z710e

i have done a couple of full recharge cycles , but still the battery shows after some hours 100%, and when its @ 11%, or 9% it stops again a long time.
Is anykind of controller in my battery broken or all the others have the same problem with the calibration?

Same problem for me ...

The same for me, right now my phone running CM7 has said 5% left, meanwhile I've had a hour phonecall and browsed the internet at the same time, so it's not reporting the correct battery. I ordered a new battery from HTC fearing this one might be going out... I've calibrated many times, even after a reset it will say 1 or 2 more percent more then it'll drop down but then still get's stuck at one level and doesn't drop or power off.

I've got the same problem, tried different rom and radios, calibrated the battery a few times and nothings fixed it. Just like everyone else my battery will stick at a % but if i reboot it will unstick for a few % then stick again. Really annoying as i have no way of knowing how much power i have left without restarting. CurrentWidget is showing around 500mA usage constantly which means i dont even get a full day out of the battery.

xdviper said:
I ordered a new battery from HTC fearing this one might be going out
Click to expand...
Click to collapse
Please Post your results when u get ur battery.
Sent from my HTC Sensation Z710e

Xdviper told me over pm that his new battery shows the right % and a better battery life now.
I will buy me an anker battery in the next days and post results.
Sent from my HTC Sensation Z710e

I got my battery yesterday, I'm calibrating now, but it still shows me with batterybattery widget that it uses about 200-300 ma on standby in the night, but when that's true and i use 500-600 ma when i use it normally, the phone would be empty after the night.
So what about you guys do you get also this strange ma reading?
Sent from my HTC Sensation Z710e

suicide monkey said:
I got my battery yesterday, I'm calibrating now, but it still shows me with batterybattery widget that it uses about 200-300 ma on standby in the night, but when that's true and i use 500-600 ma when i use it normally, the phone would be empty after the night.
So what about you guys do you get also this strange ma reading?
Sent from my HTC Sensation Z710e
Click to expand...
Click to collapse
I use Battery Monitor Widget. Settings > Monitoring > mA corrections. Then it gives more realistic mA readings, but still not perfect. But that's a HTC problem, not a BMW problem.
Sent from my Bricked Energy Sensation.

Try to wipe battery stats
Sent from my HTC Sensation Z710e using xda premium

Nikecrosoft said:
Try to wipe battery stats
Sent from my HTC Sensation Z710e using xda premium
Click to expand...
Click to collapse
Wiping battery stats is a part of battery calibration, i wrote in the first post that i did that.
So but you get normal battery readings?
Sent from my HTC Sensation Z710e

So nobody gets real ma readings?
Sent from my HTC Sensation Z710e

No.
The Sensation's ammeter is poor, so they have to estimate the actual current.
I believe the battery monitors calculate an effective mA from dV/Dt w/ and % from voltage with capacity from calibration data...
Sent from my Bricked Energy Sensation.

[Solved] Draining power on standby

Hello community.
I've installed Cyanogen and noticed that the "Phone idle" and "Cell standby" apps are draining around 50% of battery power. Why can it be so? Is radio faulty?
This wasn't a problem with stock HTC Sense...
Or maybe I should just re-calibrate the battery?

Sarnetsky said:
Hello community.
I've installed Cyanogen and noticed that the "Phone idle" and "Cell standby" apps are draining around 50% of battery power. Why can it be so? Is radio faulty?
This wasn't a problem with stock HTC Sense...
Or maybe I should just re-calibrate the battery?
Click to expand...
Click to collapse
Re-calibrating the battery stats my help represent a more accurate usage of your battery, but it wont have any effect on how long it actually lasts.
Out of interest, regardless of what is being represented in battery use graph, what time are you getting between charges? How old is your phone? Don't forget a new battery takes a couple of weeks before it's performing to full potential.
I ran CM7 for a spell and got roughly 24 to 36 hours up time, depending on whether I was using the CM kernel or the Tiamat one respectively. The Tiamat kernel gets slightly longer battery life, but that is because it under-volts so is not considered as stable as the CM one.

Well, I didn't have a chance to get an average time between charges, but it'd be something like 24 hours, so I guess, everything's OK.
Anyway, can radio software update/change improve time between charges?

Is only ever change a radio if it was to fix a specific problem, that couldn't be solved by other means. It is quite risky, and can result in a total brick if it goes wrong. Plus I'm not sure you can do it if you are still s-on.
If you are getting good performance and 24 hours battery life then I'd say leave it be. Any improvement with another radio would probably be too difficult to tell.
Sent from my HTC Desire S using xda premium

wnp_79 said:
It is quite risky, and can result in a total brick if it goes wrong.
Click to expand...
Click to collapse
Just out of curiosity: is this bricking reversible?

Sarnetsky said:
Just out of curiosity: is this bricking reversible?
Click to expand...
Click to collapse
Depends on the nature of the "brick". Some are reversible (like a USB brick), but I believe a bad radio flash would mean it was beyond any recovery that you could do yourself.
If you have any problems like poor GPS lock or bad 3G performance and you are already on the right radio for your region (which you are likely already are) then there are usually other less risky procedures to solve any problems. Changing a radio should definitely should be left as a last resort only after all other avenues have been exhausted.
24 hours battery life with moderate/heavy use is about as much as you should expect to get. Any further improvements are better made by managing your radio use and syncing schedules well. Check my downloadable pdf guide that is one of the sticky threads in the General Section. I have done a section on battery life, where I have mentioned a few tips which have helped me push the limits of my battery life to the max.
Quite surprisingly I found the biggest improvement was made when I charged my phone to 100% at night on a timer plug, and let it have a 'rest' at 100% for several hours whilst I was asleep before resuming normal use. You'd be surprised how long it then takes your battery to drop to 99% if it's had chance to cool down after a charge. A hot battery will always discharge faster than a cool one. Charge it up during the day and immediately start using it, and it's down to 99% within minutes.
Look how long this graph shows I was at full charge, and how long I got from following this...
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See if it's the same for you.

wnp_79 said:
Quite surprisingly I found the biggest improvement was made when I charged my phone to 100% at night on a timer plug, and let it have a 'rest' at 100% for several hours whilst I was asleep before resuming normal use.
Click to expand...
Click to collapse
Wow, this is the most valuable tip on energy saving I've come upon.
Along with, may be, switching to 2G instead of 2G/3G.
Thanks a lot!
By the way, I'm looking at my battery using stats, it reads this:
- Cell standby - 38%
- Phone idle - 28%
- Wi-Fi - 13%
- Display - 13%
- *some game* - 5%
- Android system - 3%
I'm used to "Display" being top consumer, so these numbers seem kinda weird, don't they?))

OK, my panic was kinda premature...
I tried not to waste energy and switched off 3G (turning it on on demand). Voila

Sarnetsky said:
OK, my panic was kinda premature...
View attachment 900570
I tried not to waste energy and switched off 3G (turning it on on demand). Voila
Click to expand...
Click to collapse
Nice. That's problem solved then!
Sent from my HTC Desire S using xda premium

@wn9
pls wat app or how can i set my fone to charge to 100% n den have it rest for several hours without doing this manually...i.e while am sleeping?
Tnx
---------- Post added at 09:58 AM ---------- Previous post was at 09:54 AM ----------
@wn9
pls wat app or how can i set my fone to charge to 100% n den have it rest for several hours without doing this manually...i.e while am sleeping?
Tnx

lynxnoon said:
@wn9
pls wat app or how can i set my fone to charge to 100% n den have it rest for several hours without doing this manually...i.e while am sleeping?
Tnx
---------- Post added at 09:58 AM ---------- Previous post was at 09:54 AM ----------
@wn9
pls wat app or how can i set my fone to charge to 100% n den have it rest for several hours without doing this manually...i.e while am sleeping?
Tnx
Click to expand...
Click to collapse
it's not an app, it's plug in timer like this

Not an app, but one of those timer plugs you can get from a hardware store. Mine is set to come on between 2am and 4am.
Edit: Nuts. Beaten to it! Yes one of those.
Sent from my SK17i using xda premium

Thanks for the info
SwiftKey Xed from my HTC Desire S using XDA App

[Q] Battery stuck at 100% | 1 hour no charger still 100% | cannot charge battery now

The Problem
As the title mentioned in the title my Battery is stuck at 100%, I've left it for an hour without the charger and it's still stuck at 100%. I plug the charger back in and the phone thinks it's fully charged so it doesn't charge.
I've turned my phone off and am awaiting instructions on a fix because if my battery goes flat I won't be able to charge it and my phone will be useless.
When it happened
I don't know when it happened exactly but I was getting S-OFF using the JUOPUNUTBEAR method as I had a H-BOOT of 1.27.0000 which revolutionary.io couldn't S-OFF.
Once I got S-OFF I installed LeeDroid ROM and then I noticed my battery was stuck at 100%.
What I've tried
Using a different battery (I have OEM and Anker)
Changing ROM to Android Revolution HD
Extra Information
While changing Roms I installed 4EXT Touch Recovery which in Recovery mode it has it's own Battery Meter, they also said the battery was full (though I didn't unplug it for long)
I have the same 100% stuck problem with Android Revolution HD, I'm starting to get worried and yes I have waited an hour without the charger connected and still have this problem.

Does it do this with all Rom? Have you tried to calibrate, possiably app might allow you to change the configuration? I'm just guessing here, hopefully you will find a fix. I've never heard of this before, this is a new one. Perhaps someone with more knowledge can help! Sorry I couldn't be of more help.
Sent from my HTC Sensation 4G

Have you tried using it heavily for 30 minutes like playing a game or something?

I experienced this issue but its only with some roms. I left my phone on overnight not charging (8pm-11am) when I last use the phone and it still said 100%.
Sent from my HTC Sensation Z710e using XDA

try wiping battery stats first
use battery monitor widget or battery calibration app or from recovery(4EXT ->wipe|format->wipe battery stats )
then if it still didnt fix the issue
try another ROM or reflash the same rom...but before doing that ...
i want you to wipe everything using inbuilt 4EXT wipe feature not superwipe
(4EXT-> wipe|format ->format all partitions except sdcard)
then flash the rom
if its still fix the issue
flash an RUU (this will cleanup everything)

ganeshp said:
try wiping battery stats first
use battery monitor widget or battery calibration app or from recovery(4EXT ->wipe|format->wipe battery stats )
then if it still didnt fix the issue
try another ROM or reflash the same rom...but before doing that ...
i want you to wipe everything using inbuilt 4EXT wipe feature not superwipe
(4EXT-> wipe|format ->format all partitions except sdcard)
then flash the rom
if its still fix the issue
flash an RUU (this will cleanup everything)
Click to expand...
Click to collapse
I wiped battery stats from 4EXT recovery which hasn't fixed this issue.
I will re-flash Android Revolution using your instructions tomorrow.
If my battery goes flat during an ROM install what's the worst that could happen, could I completely brick my phone or could I still access recovery to restore my ROM Backup, or re-install ARHD ROM from 4EXT.
If all that fails what would be a good RUU to flash? would I then have to make my phone S-OFF again?
Thanks for your time, it's much appreciated.

dmk0 said:
I wiped battery stats from 4EXT recovery which hasn't fixed this issue.
I will re-flash Android Revolution using your instructions tomorrow.
If my battery goes flat during an ROM install what's the worst that could happen, could I completely brick my phone or could I still access recovery to restore my ROM Backup, or re-install ARHD ROM from 4EXT.
If all that fails what would be a good RUU to flash? would I then have to make my phone S-OFF again?
Thanks for your time, it's much appreciated.
Click to expand...
Click to collapse
If the battery runs out just leave it to charge for a while. You'll still be able to get into recovery so it doesn't really matter I think
Sent from my HTC Sensation Z710e using XDA

ganeshp said:
try wiping battery stats first
use battery monitor widget or battery calibration app or from recovery(4EXT ->wipe|format->wipe battery stats )
Click to expand...
Click to collapse
Before I seen your post I wiped batterystats.bin with the BatteryCalibration App from the android market and didn't do anything. As I explain below I got it to work with 4EXT recovery wiping battery stats, but I thought the Battery Calibration app did the same thing. In that case I think taking the battery out and in for a second time may have worked.
dmk0 said:
I wiped battery stats from 4EXT recovery which hasn't fixed this issue.
Click to expand...
Click to collapse
Actually I waited a little longer and my phone went down to 98%. I left it on overnight and now it's 63%. It looks like it's working again.
But with further checking I noticed a couple of other weird things.
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If you look at my pictures above, here it says "Status: not charging (0mins)" & "Status: not charging (19mins)".
When I took them screenshots I hadn't had my phone on charge for over 10 hours. Oddly for very small intervals it's charging itself. At one stage I think I check it it was 75% then I checked again and it was 76%.
Something else that looks a bit odd is my phone temperature, in my screenshots you can see it says it's "11.9" & "11.6" degrees. It's over 14 degrees here in Australia how could my phone be colder than the temperature outside. I remember my phone used to be "26" degrees often. "11.6" dosen't seem right.
Do these two issues seem familiar to anyone. I know there not big problems but it would be nice to have them corrected.
EDIT: I decided to do a Backup in 4EXT and my phone was saying 55% battery and in 4EXT my phone says it was 62% why the difference? Could this be a problem? which one would you think is the correct one.
EDIT2: It did go down to 55% pretty quick while doing the backup, prehaps it needed time to work out battery life.
EDIT3: Now m phone battery says it's 72%, then it quickly went down to 69%. It never used to do this before I rooted. Could this case any problems, like the battery to go too flat to the point it's unrecoverable.
Sorry for all the edits and questions, I just like to understand my phone and be sure I don't break anything

Battery percentage fluctuations are common when you just change a rom.. Even after reboot if the battery percentage goes up then within few minutes the percentage goes to its actual.. The battery requires some time to settle so when you change the rom or kernel these fluctuations do happen(remember these fluctions are in numbers only the battery charge doesn't increase Actually)
Once you use a same rom for like a week or so.. The battery stats sync up with your usage.. So no worries
Also regarding the temperature it seems like the battery you have doesn't have temperature sensors (anker doesn't have sensors too so always temperature is 11C for me)
Sent from my pyramid.. Through blazing fast sonic waves

Anker does not have a proper thermistor.

Why would you even complain when you have such great battery life? That's pretty strange
Sent from my HTC Sensation using XDA

I think I have a similar problem with yours. The issue with my sensation is that it charges up to 100% and after I unplug it the LED stays lit up green until around 85%. Once it goes lower than that, the battery icon shows that its charging and the LED stays lit red but the battery percentage is decreasing and it continues to do so until around 60% remaining. Then when it gets to 59% the LED turns off then that is only the time that the time in the battery stats starts to record how long its been on battery for me. Sometimes at full charge when I start to use the phone for heavy usage such as games, the LED starts to change to red even if its around 95% and unplugged from the charger. There are times that when the LED light is red and I plug the charger to the phones USB port and not connect it to an outlet, the LED light turns off. I don't know what caused this since I just got my Sensation from another person. Still all features are working great and am able to flash ROMs normally. Kinda a flashaholic if its even called like that. No other issues other than this. I haven't tried to use a different battery since I don't have the extra cash yet. Please bear with my long post. Thanks.

This is not a problem. This is normal.
I go to work at 100% and dont use the phone much. Several hours later it still shows 100%.
Relax. Its not a bad thing. The battery is not draining rapidly and lying to you about it.
Sent from a rebel ship by storing the message in an R2 unit. (Help me, XDA. You're my only hope)

It takes a few cycles to with right. I can use my phone for up to an hour, plug it in and the light is green. No big deal, as the phone doesn't want to overcharge the battery. As so as the percentage drops, it charges. It gets better as you use it more.
Sent from my HTC Sensation 4G using XDA

Weird battery issue

For the past little while my battery has been draining very quickly. It turns out that my power button wasn't grounded and stopped working soon after the battery issues started. I got the power button replaced and ordered a new battery, but now the battery is acting even weirder and I'm not sure if it's a issue with the new battery or with my phone.
The battery will drain fairly slowly (six hours to go from 90% to 50%), but will then drop from 50% to 30% in a matter of minutes and then to 13% even quicker before the phone will shut down completely. I've tried wrong the battery stats but it doesn't seem to have helped.
I'm guessing that it's a problem with the new battery, but I was wondering if anyone had experienced any similar issues? I'm going to switch back to the old battery and see how long it lets as a test but I would like to figure this out soon. Thanks
Sent from my Nexus 7 using xda app-developers app

Hi,
Maybe u can post ur battery stats to help us understand what ur using during the battery drain.
What ROM/kernel are u using?
Is the drainage during WiFi or data usage. If its data, how strong is ur signal?
There is so much that can be causing this so the more info, the better.
Oh, and is the new battery a knock-off? If so that can also be an issue.
Where did u buy it?
Thx
Vs Nexus S4G using tapatalk2

vidaljs said:
Hi,
Maybe u can post ur battery stats to help us understand what ur using during the battery drain.
What ROM/kernel are u using?
Is the drainage during WiFi or data usage. If its data, how strong is ur signal?
There is so much that can be causing this so the more info, the better.
Oh, and is the new battery a knock-off? If so that can also be an issue.
Where did u buy it?
Thx
Vs Nexus S4G using tapatalk2
Click to expand...
Click to collapse
My battery stats from last night were mainly screen and maps. I turned off automatic updating in maps though. I can edit this post after I use my phone a bit.
I'm on stock everything but rooted.
I always leave WiFi on, but the battery has gone from 50 to 30 to dead when I wasn't connected to a network. My signal without WiFi is normally three to four bars, and WiFi is about the same.
The new battery is more than likely a knockoff. I ordered a $10 battery from eBay (my bad).
Sorry about not paying more info. I wasn't sure what else to post. Please let me know if there's anything else you need to know. Thanks
Sent from my Nexus 7 using xda app-developers app

hoponpop said:
My battery stats from last night were mainly screen and maps. I turned off automatic updating in maps though. I can edit this post after I use my phone a bit.
I'm on stock everything but rooted.
I always leave WiFi on, but the battery has gone from 50 to 30 to dead when I wasn't connected to a network. My signal without WiFi is normally three to four bars, and WiFi is about the same.
The new battery is more than likely a knockoff. I ordered a $10 battery from eBay (my bad).
Sorry about not paying more info. I wasn't sure what else to post. Please let me know if there's anything else you need to know. Thanks
Sent from my Nexus 7 using xda app-developers app
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Well if you're stock(I assume you rooted but kept the same ROM) then maybe you can change kernels
or
Look for a ROM that has the stock feel but has tweaks that can save your battery life. There are a few out there.
But you'll get arguments that stock is not always the best ROM for great battery life.
Its a personal choice so look at the ROMs and pick one after you've read the thread to see similar issues/wants from it.
Good luck

If you are on Jellybean Stock then you should seriously consider using a custom ROM because Google hasn't yet released the perfect Jellybean like they released the perfect ICS in 4.0.4 update..
Secondly, you should try cyanogenmod based ROMs whichever have been great when talking about battery life (There are really awesome ROMs out there).
And follow the below mentioned steps and observe for a full 100-0% cycle drain times and get screenshots of battery stats with screentime and post here..
1. Turn the Screen Brightness to minimum; the tolerable value for you.
2. Remove any unwanted apps.
3. Keep WiFi switched off when not in use.
4. Set the multitask value by Going to Settings -> Developer options -> Background process limit -> At most 4 processes
5. Use minimum widgets and minimum home screens if possible
6. Uncheck the location services in settings. You can switch them ON when required very easily.
7. Clear Running Apps from Settings -> Apps -> RUNNING & also by long pressing Home button.
8. Clear cache at regular intervals and always use back button rather than using Home button
If above steps make a difference then it will become your style or else change the battery and get something like from OEM.
Sent from my Nexus S using xda premium

I took some of dark's advice, although I had already been doing a lot of that stuff. I'm not complaining about the battery life on the stock rom (I have already accepted that it's not the best), but rather the issue of having my battery drop from 50% to dead within 20 minutes, even without use (not at all normal for me). Does anyone know what could be causing that issue?

hoponpop said:
I took some of dark's advice, although I had already been doing a lot of that stuff. I'm not complaining about the battery life on the stock rom (I have already accepted that it's not the best), but rather the issue of having my battery drop from 50% to dead within 20 minutes, even without use (not at all normal for me). Does anyone know what could be causing that issue?
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How about a screen shot of ur battery stats?
There could be an app or the OS hogging up ur battery.
Vs Nexus S4G using tapatalk2

vidaljs said:
How about a screen shot of ur battery stats?
There could be an app or the OS hogging up ur battery.
Vs Nexus S4G using tapatalk2
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My battery seems to be holding strong. I'm worried about what will happen when it hits 50% though.
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Sent from my Nexus S using xda app-developers app
edit: i'm sort of wondering if my phone is reading the battery correctly. it kind of seems like six hours is a lot of uptime just to get to 50%, so the rapid drop to zero might just be because the phone isn't correctly reporting the battery's charge.
edit #2: my phone got down to ~30% battery no problem before it shut off completely. upon plugging it in to get the phone turned on, the battery had dropped to 20% and then dropped to 17% with the screen off and the phone plugged in

Clear Battery Stats
hoponpop said:
My battery seems to be holding strong. I'm worried about what will happen when it hits 50% though. View attachment 1386251View attachment 1386253
Sent from my Nexus S using xda app-developers app
edit: i'm sort of wondering if my phone is reading the battery correctly. it kind of seems like six hours is a lot of uptime just to get to 50%, so the rapid drop to zero might just be because the phone isn't correctly reporting the battery's charge.
edit #2: my phone got down to ~30% battery no problem before it shut off completely. upon plugging it in to get the phone turned on, the battery had dropped to 20% and then dropped to 17% with the screen off and the phone plugged in
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Your battery seems to be good enough to withstand the usage. There is one thing you can still try;
Let the battery drain completely and let the phone get switched off.
1. Now plug in the charger and on the phone go to your recovery. Here I suppose you have the latest CWM recovery.
2. Go to Advanced -> Clear Battery Stats -> Confirm by scrolling. Then reboot the phone and avoid using it before it's charged completely.
3. Now let the battery charge 100% and only after that you unplug it and don't interrupt the charge cycle.
4. Observe the changes in discharge timings. And also paste a screenshot of Screen Usage time by tapping on Settings -> Battery -> Screen (The Time on details...)

darkmentor25 said:
Your battery seems to be good enough to withstand the usage. There is one thing you can still try;
Let the battery drain completely and let the phone get switched off.
1. Now plug in the charger and on the phone go to your recovery. Here I suppose you have the latest CWM recovery.
2. Go to Advanced -> Clear Battery Stats -> Confirm by scrolling. Then reboot the phone and avoid using it before it's charged completely.
3. Now let the battery charge 100% and only after that you unplug it and don't interrupt the charge cycle.
4. Observe the changes in discharge timings. And also paste a screenshot of Screen Usage time by tapping on Settings -> Battery -> Screen (The Time on details...)
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Click to collapse
I'll try that later. I thought you were supposed to reset battery stats when your battery was completely charged so that's how I did it the first time thanks
edit: i'm just about to reset the battery stats again. my phone decided to show 40% battery as I was walking home, but then shut off and shows 0% battery now that i'm home and have access to a charger. i'll let you know what happens once the phone is fully charged. additionally, my phone will say charged while plugged in when my battery monitor thing says that it's only at ~89%, so I don't know if that has anything to do with it. thanks again

Everything seems to be going well today. I'm about 8.5 hours on battery now so I figure I'll let my phone charge a bit. Thanks again, dark. Hopefully this time it'll stick.
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Every battery exhibits different discharge curves vs voltage. The os estimates battery level based on voltage. It is possible that the batteries discharge curve is just very flat throughout with a steep drop in voltage near the end which would produce the results you are experiencing. Wiping battery stats has no bearing on this issue, google cleared up what battery stats really does over a year ago. Best suggestion is to drain the battery fully, charge to 100% and repeat the process several times. This will help both the batteries discharge curve and the os's estimation based on voltage. If the problem persists, buy another battery (preferably not a knockoff) and test again. If you are still having problems after that, you may have a hardware issue with the phone. Does not seem to be a Rom issue, otherwise the drain would be happening constantly, not just after 50%.
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