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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.

[Q] Help with identifying Nexus S i9020a Battery Drain

Running Stock ICS 4.1.2 on Nexus S i9020A on AT&T US.
The battery was fine till about a few months back, but of late, it is draining @ around 8-10% per hour on standby!. I originally thought JB was causing the drain, and switched to ICS, and finally to GB. But the drain is consistent across all three.
There is also accelerated battery drain if my phone is completely switched off. If I leave the battery in the phone after powering off, the battery goes from 100 - 0 in less than 4 hours. Thinking the battery might have gone bad, I bought another oem battery, but that is exhibiting the same behavior.
This leads me to think there might be a hardware issue with my phone. I am tired of keeping the phone plugged in at all times, and am ready to throw this out the window and get another phone. As a last ditch effort, I wanted to post this here to see if I can get any kind of feedback/confirmation on this before I buy another phone. Other users are reporting 1-2% battery drain on standby, so 8-10% drain is unacceptable by any standard.
I have attached some screenshots from today when the battery was at 20% after about 9 hours. For this test, I did the following last night:
1. uninstalled all apps I downloaded
2. turned off WiFi, Bluetooth, GPS, sync, auto brightness ( set to the minimum brightness)
I charged the phone fully, and then left it on standby, with minimal usage - I think I made a 2 minute call, checked my email once, and read some rss feeds for about 5 minutes in the 9 hours I tested it.
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Bettery Battery Stats Logcat and dump:
View attachment BetterBatteryStats-2013-03-25_204343792.txt
View attachment logcat-2013-03-25_204338703.txt
Any help would be much appreciated.
Thanks!

I know I'm not giving any advice here but I just wanted to let you know I'm in the same boat. No matter what ROM GB/ICS/JB I lose too much battery per hour with the phone just on standby. There's no explanation for %10 battery drain per hour with pretty much everything off (wifi, data, gps, nfc, background data, etc)
I have tried everything and now I must admit I've given up. I'm just going to ride out CM 10.1 until I can decide on a new phone, most likely the Nexus 4 or HTC One.

abccg said:
I know I'm not giving any advice here but I just wanted to let you know I'm in the same boat. No matter what ROM GB/ICS/JB I lose too much battery per hour with the phone just on standby. There's no explanation for %10 battery drain per hour with pretty much everything off (wifi, data, gps, nfc, background data, etc)
I have tried everything and now I must admit I've given up. I'm just going to ride out CM 10.1 until I can decide on a new phone, most likely the Nexus 4 or HTC One.
Click to expand...
Click to collapse
Bro, just replace the battery, buy a new one!

Doesn't seem like a software issue to me, sadly.

That confirms my suspicion. I guess it is time to start looking for a new phone. Thanks!
polobunny said:
Doesn't seem like a software issue to me, sadly.
Click to expand...
Click to collapse

kandroid said:
That confirms my suspicion. I guess it is time to start looking for a new phone. Thanks!
Click to expand...
Click to collapse
Yeah, your phone doesn't seem to be doing much while asleep. 20 minutes screen on, 35 minutes active, yet battery down to 21%. My battery would be at 90% with that sort of usage. Since you changed the battery (I'll assume it's a decent quality battery, although a cheap battery could be in cause), there's not much left.

Have you tried switching 3G off? 3G seems to SUCK the life out of these Nexus S batteries like no tomorrow.
But I suspect it's a hardware issue with the Nexus S phones. I have WiFi, Bluetooth, 3G and auto-sync all shut off and a static wallpaper and I will lose 20% of my battery in 7-8 hours.

Battery is kernel related. Try changing your I/o scheduler to row and governor to smartassv2. If you don't have those options then look for a kernel that does...air kernel and matrix should suffice.

NO SOLUTION so far
A friend was having the same issue, gave him the battery of my nexus s ... it lasted him for 7-8hrs max whereas it gives me 1 day~ on 2G and normal use without gaimng . So my guess like his mobile your mobile may have some component which is short and draining out the battery . I have been trying to look around for answer but so far no luck. So better check it with another batteryif you can before purchasing a new one.

Vampire test
If anyone is investigating why their Nexus S suddenly starts draining the battery in a matter of hours, BEFORE spending a ton of time (like I did) trying to diagnose what software problem you might have, do the vampire test, as described here:
http://forum.xda-developers.com/showthread.php?p=42586314
I wasted days before coming across this test on this forum, and it proved it had to be a hardware fault.
I have two healthy batteries, both hold a charge for days (probably weeks) when not inserted in the phone, but pop one in the phone, leave it powered off, and within 6 hrs it's dead. So frustrating, and sad to see this phone go.

[Resolved] Battery acts weird - increase in percentage when unplugged

Hey, I'm new to XDA (I have read rules),
My brand new device (I have it only a week and half):
Nexus 5 D820 310K, 4.4
I felt once big bump in battery percentages (52%>>28%) on 4.4.2 after a restart of my device. after this incident I noticed few more small bumps (3% jump to 4 and back to 3...)
First I blamed 4.4.2 so I flashed 4.4 and calibrate the battery, here what GSAM reports now:
when it reached to 60% its started to jump between 60% and 61% five times in 17 mins
on 13% its start settle to 12%>>11%>>12%>>13%>>14%
after both cases it backed to the normal route of decrease until the next time..
*I ignored the lack of indicator of the 28% and 59% in GSAM. (its a bug as far as I know)
Is my battery defective and I need RMA?
How can I be sure its the battery's fault and not in the chip which monitor it? (May the monitor is built in the battery?)
if its the battery's fault Brand new battery can help instead of RMA?
Thanks!
***I tried to search but I couldn't find anything but it:
http://forum.xda-developers.com/showthread.php?t=2550689&highlight=battery+bump
and It's lack the answer I need.

have you tried wiping the cache from the stock recovery or even possibly a factory reset (also from recovery)? i'd start there before i'd consider an rma.

^^
When I flashed 4.4 from 4.4.2 I have opened the bootloader in the first time so I actually totally wiped my device include cache - Am I right?
If this wipe is "count" it haven't helped me...

its normal behavior.
and sometimes when using the phone heavily, the battery % will drop, then when you put the phone down, youll notice the battery % rise slowly. thats not the phone, but the coding for the battery stats. its always been that way on android, ever since the first g1.

^^
Are you sure? I have never noticed similar incident on my nexus 4/7

WishMonster said:
^^
Are you sure? I have never noticed similar incident on my nexus 4/7
Click to expand...
Click to collapse
yes. the past 5 years of android ive seen it too many times, and have had fun with it many times(ghost charge). its very common when flashing mods to see it occur, and when benchmarking at high cpu speeds. but it happens often after a plain old reboot as well. it "ghost" charges ti make itself accurate again when its not accurate.

I noticed last night my battery tanked. I didn't even use my phone. I'm very conscious of my battery life and I monitor it often. So I had no notable wakelocks at all. Battery dropped from 95% down to 45% within a 3-4 hours idling. Less than 10-15 min screen on time.
Odd thing was, I plugged it in the charger and it charged back to full within 20-30 min. Something definitely is up with the percentage readouts.

simms22 said:
yes. the past 5 years of android ive seen it too many times, and have had fun with it many times(ghost charge). its very common when flashing mods to see it occur, and when benchmarking at high cpu speeds. but it happens often after a plain old reboot as well. it "ghost" charges ti make itself accurate again when its not accurate.
Click to expand...
Click to collapse
So what you say is that's luck that I haven't noticed same phenomenon on my other devices?
By your permission, I would like to some more opinions
May I just freak out after the giant drop in 4.4.2 and 4.4 is ok... - anybody felt similar drop on 4.4.2?

I noticed this on the first two days of owning my N5. I updated to 4.4.2 straight away and then saw the slight increases on the battery report. I'm running stock and it only happened on the first two days. I love this phone but man do I miss my GS3 and 4400mah battery.
Sent from my Nexus 5 using xda app-developers app

Well, Am I the only on to notice this kind of problem?
In the past few day I haven't felt big drop on 4.4 and actually the battery acts pretty good about 3.5~4 hours of screen 14 hours of standby - probably simms22 is right.
May there is something to 4.4.2 update to it? (some friends told me that their batteries acts weird on 4.4.2 too)

just so you know, i can reproduce this. its happened on every device ive had since android 1.0. on the nexus 4 it actually was a big problem for some. it would drop 30-70% for some after benchmarking, and some phones would think that the battery level went below 0%, then wouldnt boot up until the battery was removed then put back in(lg fixed the issue though). if you heard of the "red light of death", that was one of the causes. for me it would drop 30-70% after benchmarking, but never went below 1%. then after a reboot or two, the battery level was accurate again.

simms22,
Thank you very much,
after few days I haven't felt any big drops (4.4).
GSAM reports that there is sometimes small bumps from 60 to 61 and then back to 60 but its nothing serious (probably its happened on my Nexus 4 too but I haven't noticed).
We are done here
P.S.:
Do you know why sometimes I get a notification about bug report: "hammerhead-user 4.4 KRT16M 893XX3 release-keys"? I would be more than happy to know.
In addition do you recommend to re-update to 4.4.2 even though all the battery bugs started right after the update?

WishMonster said:
simms22,
Thank you very much,
after few days I haven't felt any big drops (4.4).
GSAM reports that there is sometimes small bumps from 60 to 61 and then back to 60 but its nothing serious (probably its happened on my Nexus 4 too but I haven't noticed).
We are done here
P.S.:
Do you know why sometimes I get a notification about bug report: "hammerhead-user 4.4 KRT16M 893XX3 release-keys"? I would be more than happy to know.
In addition do you recommend to re-update to 4.4.2 even though all the battery bugs started right after the update?
Click to expand...
Click to collapse
you get the bug report with a combo button press(i dont remember what buttons as its removed from my rom(power plus another i think). but i remember i kept getting them on my n4 until it was removed). and reupdating wont help, you can try if you want as it wont hurt either.

matt_not_andrew said:
I noticed this on the first two days of owning my N5. I updated to 4.4.2 straight away and then saw the slight increases on the battery report. I'm running stock and it only happened on the first two days. I love this phone but man do I miss my GS3 and 4400mah battery.
Sent from my Nexus 5 using xda app-developers app
Click to expand...
Click to collapse
GS3 has a 2100 mAh battery not 4400. If you're saying you had need for and were using an external battery then what is there to miss I don't understand. Any phone can use an external battery or battery case.

WishMonster said:
simms22,
Thank you very much,
after few days I haven't felt any big drops (4.4).
GSAM reports that there is sometimes small bumps from 60 to 61 and then back to 60 but its nothing serious (probably its happened on my Nexus 4 too but I haven't noticed).
We are done here
P.S.:
Do you know why sometimes I get a notification about bug report: "hammerhead-user 4.4 KRT16M 893XX3 release-keys"? I would be more than happy to know.
In addition do you recommend to re-update to 4.4.2 even though all the battery bugs started right after the update?
Click to expand...
Click to collapse
heres an obvious drop then rise, just as an example. its from bencmarking at high cpu speeds. i was benchmarking, hit the cpu shutdown temp, rebooted automatically, and booted up near 80% less than the battery % was when i rebooted. then, without plugging in, the battery "magically" charged itself a bit, trying to go back to where it should be. and if i didnt keep using the phone, it would eventually equalize. this is an extreme example, but its the same as with yours. with use, battery drop, sometimes it drops a little more than it should. so it tries to go back to where it should be.
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Nexus 5 battery problems

Hi. I have a two-months-old Nexus 5 (stock ROM & kernel; rooted). Two days ago my battery suddenly started having some problems. First of all, it doesn't last more than 1-2 hours with normal phone usage. Then it often becomes hot, even when not charging. Last but not least, if I keep using my phone while charging, it charges incredibly slowly, or it doesn't charge at all (the charge remains stable). I'm using the stock charger. Any suggestion?

Jaggions said:
Hi. I have a two-months-old Nexus 5 (stock ROM & kernel; rooted). Two days ago my battery suddenly started having some problems. First of all, it doesn't last more than 1-2 hours with normal phone usage. Then it often becomes hot, even when not charging. Last but not least, if I keep using my phone while charging, it charges incredibly slowly, or it doesn't charge at all (the charge remains stable). I'm using the stock charger. Any suggestion?
Click to expand...
Click to collapse
What does the battery settings show?
Paste your battery screenie, please..

wideasleep1 said:
What does the battery settings show?
Paste your battery screenie, please..
Click to expand...
Click to collapse
Here you go:
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"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
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Just buy another phone that has higher than 2300 milliampz

Jaggions said:
Here you go:
Click to expand...
Click to collapse
Looks like wakelocking. You'll need root and BetterBatteryStats to fix it (without guessing).

dicecuber said:
Just buy another phone that has higher than 2300 milliampz
Click to expand...
Click to collapse
The Nexus 5 has been proven to last longer then an SGS4 which has a bigger battery, and the HTC one with the same size battery (under proper testing conditions) all while using a faster SoC. Do you troll the forums for those phones as well?
Maybe a Moto G or LG G2 would suit some people better for their increased battery life, but that doesn't mean you need to troll every thread on here with false accusations.
If you'd like any more proof on how the N5 battery lasts longer and is more efficient than competing phones of higher prices, just let me know.

Aerowinder said:
Looks like wakelocking. You'll need root and BetterBatteryStats to fix it (without guessing).
Click to expand...
Click to collapse
I did what you said; I have attached some screenshots. I'm not an expert about this, but it seems like you were right. What shall I do?

The most important stat to look at is partial wakelocks - it lets you see which app or apps are waking.

Mort said:
I'll have to check on that... I think it might not be that easy...
Click to expand...
Click to collapse
Just attach the log, missing info from those screenshots.

Aerowinder said:
Just attach the log, missing info from those screenshots.
Click to expand...
Click to collapse
Sorry for the delay. Here you go:
https://www.dropbox.com/s/5og53439mj8b5cg/BetterBatteryStats-2014-01-28_175226040.txt

Jaggions said:
Sorry for the delay. Here you go:
https://www.dropbox.com/s/5og53439mj8b5cg/BetterBatteryStats-2014-01-28_175226040.txt
Click to expand...
Click to collapse
Go into device settings > Location. Set Mode to Device only. Ensure that the Google location reporting in that same area is off.
Take another BBS log and post it.

I experience the same issues. Not charging when connected or even lose charge when connected. I am still figuring out what causes it. First of all try using the original cable and charger. Second, disconnect the charger when the screen is on, I read somewhere that can help as well.
Today I had the same issue again, but just before I started charging, the battery would lose 1% per 2 minutes and my phone became very warm.
If I find out more, I will let you know.
Sent from my Nexus 5 using xda app-developers app

Aerowinder said:
Go into device settings > Location. Set Mode to Device only. Ensure that the Google location reporting in that same area is off.
Take another BBS log and post it.
Click to expand...
Click to collapse
I did what you said and today the battery drained much faster then before. Here you have the logs: https://www.dropbox.com/s/b5temccnzh1mnky/BetterBatteryStats-2014-01-29_121755481.txt

Jaggions said:
I did what you said and today the battery drained much faster then before. Here you have the logs: https://www.dropbox.com/s/b5temccnzh1mnky/BetterBatteryStats-2014-01-29_121755481.txt
Click to expand...
Click to collapse
EntriesRefresh_wakelock (com.google.android.googlequicksearchbox.Google Search): 4 h 47 m 17 s (17237 s) Count:0 98.6%
That is the problem. That particular wakelock belongs to Google Now. I hope you don't use it, because the solution is to turn it off (from within the program). You could try force stopping and/or wiping it's data. But the fact of the matter is that it's a bug in the app.
Google Now has been this way since it was released. The only conclusion I can draw is that Google doesn't care. It's never behaved properly. And that location reporting (that you've now disabled) is completely out of control, been that way for a year now. I actually greenify the Google apps now. I'm tired of putting up with the lazy programming. Keep, Now, Chrome, Drive, Maps, I greenify all of those. I still allow them to sync, but Greenify will kill them again after they are finished.

Jaggions said:
I did what you said and today the battery drained much faster then before. Here you have the logs: https://www.dropbox.com/s/b5temccnzh1mnky/BetterBatteryStats-2014-01-29_121755481.txt
Click to expand...
Click to collapse
Thank you. I'll try disabling google now and I'll let you know.
Sent from my Nexus 5 using xda app-developers app

I can confirm that I have no battery problems anymore (today after 6 hours of average usage it was still at 80%!!). Thank you all for your help!

Good to hear. If anyone else see's Android OS or Search taking up 50% or more of your battery that can be mitigated.

Jaggions said:
Hi. I have a two-months-old Nexus 5 (stock ROM & kernel; rooted). Two days ago my battery suddenly started having some problems. First of all, it doesn't last more than 1-2 hours with normal phone usage. Then it often becomes hot, even when not charging. Last but not least, if I keep using my phone while charging, it charges incredibly slowly, or it doesn't charge at all (the charge remains stable). I'm using the stock charger. Any suggestion?
Click to expand...
Click to collapse
Take out your Battery, put it on a flat surface say a table. Try to Spin it....if it spins over 2 rounds then you need to buy a new battery.

OPO battery drops dramatically after the last OTA

After installing CM13.1-ZNH2KAS254 the battery lasts only four to five hours by merely using the phone.
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- How many full cycles have you had since updating?
- Are you using the original OPO charger and USB?, aftermarket products don't offer the same charge rates so may affect battery use.
- You have a device that is 2 years old, the battery regardless of it's total charging cycles is already past its 12 month expected lifespan.
- Try clearing the cache via recovery, this is something always recommended after an update, regardless of how small as it irons out any duplicates or issues.

I bought the phone this year, I am using the original charger and cable, but I have been charging it whenever I had the chance because of my work. For example from 35% to 80%, never letting the battery drain out completely. I contacted OnePlus and they advised me to let it shut down and full charge the phone three times. I will post the resaults.

I also use tethering a lot, at home on my desktop pc. I see that while tethering is on, the phone is charging really slow, like 1-2% every 10 minutes. Could this be linked to the battery lifespan?

Battery issue and screen overlay issue after update 13.1
After update my OPO yesterday to CM 13.1 ZNH2KAS254, two major issues I m facing ans furst is battery charging is very slow in simple words its not charging and second is screen overly issue due to my applications not behaving properly. Please help as it was working fine before update

Sf3d0 said:
I also use tethering a lot, at home on my desktop pc. I see that while tethering is on, the phone is charging really slow, like 1-2% every 10 minutes. Could this be linked to the battery lifespan?
Click to expand...
Click to collapse
Pankajar said:
After update my OPO yesterday to CM 13.1 ZNH2KAS254, two major issues I m facing ans furst is battery charging is very slow in simple words its not charging and second is screen overly issue due to my applications not behaving properly. Please help as it was working fine before update
Click to expand...
Click to collapse
This is a known issue of slow charging with the latest official update. If you are rooted the device, you can switch to Custom ROM like sultanxda's which does not suffer from slow charging.
Battery life actually depends on how you use the device. If you just use the device to read, it'll last longer. If you use the device only on WiFi, it'll last longer. If you have good network coverage, it will last little longer and most important is the age of the device.
Battery drain can be because of some of the apps using the device resources(like Google Play Services etc) continuously and not allowing the device to go into deep sleep mode.
Tethering drains a lot of battery as your device acts as a router and gets the power from the battery

Sf3d0 said:
After installing CM13.1-ZNH2KAS254 the battery lasts only four to five hours by merely using the phone.
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Click to collapse
This is a common issue on MM roms and the OPO.
Lots of people are reporting wacko battery behavior after upgrading to MM.
In my experiments, the CM 13.1 by Sultanxda was the least offending, and possibly COS, but I don't exactly remember about COS.
Switching back to LP will correct any battery issues.

What about screen overlay which is very frustrating.
Mr hOaX said:
This is a known issue of slow charging with the latest official update. If you are rooted the device, you can switch to Custom ROM like sultanxda's which does not suffer from slow charging.
Battery life actually depends on how you use the device. If you just use the device to read, it'll last longer. If you use the device only on WiFi, it'll last longer. If you have good network coverage, it will last little longer and most important is the age of the device.
Battery drain can be because of some of the apps using the device resources(like Google Play Services etc) continuously and not allowing the device to go into deep sleep mode.
Tethering drains a lot of battery as your device acts as a router and gets the power from the battery
Click to expand...
Click to collapse

It's been almost 1.5 years since I'm using my OPO.
With the latest COS update, battery backup hasn't changed anything toward bad if not better.
6-6.5 hours SOT always based on my usage. While I get under 5.5 hours SOT with similar tweaks using SultanXDA CM e.g.
COS 13.1 is running really good for me, battery is great, and honestly, since COS 13 came out, I've literally stopped using custom ROMs while on COS 12/12.1 I was barely using the official ROM. Mostly was on Resurrection Remix.
So battery backup wise, COS is "GREAT" if you know what to tweak, and yes the phone charges from 1%-100% in 1.5 hours using the stock charger.
Do a battery calibration, complete calibration, here's what I do after every flash, drain to sub 1% when phone turns off, go to recovery and keep it there until it "completely drains itself to death", then start charging from complete zero all the way up to 100%. That works for me, can't take any guaranty for your device though.

[SOLVED]
I did what they suggested and the battery lasted a full day, 08:00 to 02:00.