Develop Bugs

[Q] Blazer ROM- Battery Issues

So I rooted my phone and flashed the Blazer ROM. Everything flashed well and I am loving the look of this ROM. My only issue is that now my battery is draining very fast. It seems to be going down faster than before the flash. I tried calibrating the battery with one of the marketplace apps, but it hasn't done much. One of the main reasons for flashing was to improve the battery life. I am looking for any suggestions on what I can do? Is there any point in trying to re-flash the rom? Any help will be appreciated.
Thank you in advance!

Give it a few charging cycles for everything to settle in....also download better battery stats and check for possible wakelocks
sent from the near past

I had the same problem with this version of Blazer Rom. After my 4th charging cycle I had to get off it. I couldn't get a whole day use. For some reason battery drained hella fast. I'm back on stock rooted now. No rom has given me better battery life than when I'm on the stock one so far. I usually give the rom about 4/5 days to see any improvements. If too many bugs or battery drain I'll get off it sooner than that.

OK thanks! I guess I will try and give it another couple of days and see if it improves. If not I'll consider switching ROMs. Sorry but what is a wakelock? I'm still pretty new with all of this.

had same issue i just flashed rom three times and since then ive been getting a good 16 to 20 hours on one charge.

had the same issue, i was at work and charged my phone, one our latter my battery was down 20 percent went back to stock root.
Im also curious, what's wakelock?

AdamRabb said:
OK thanks! I guess I will try and give it another couple of days and see if it improves. If not I'll consider switching ROMs. Sorry but what is a wakelock? I'm still pretty new with all of this.
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Click to collapse
wakelock is a term meaning an app I going rogue keeping your kernel awake. if you use bettery battery stats and cpu spy you can see what keeps waking your phone up when its supposed to be in a deep sleep. btw when charging it doesn't go into deep sleep. so it may give you a weird result if you check after a charge. also do not spend any money on battery calibration apps. every app I have come across tries to calibrate by deleting battery stats. which has been proven to do nothing. just a heads up dude.

omargs7 said:
had the same issue, i was at work and charged my phone, one our latter my battery was down 20 percent went back to stock root.
Im also curious, what's wakelock?
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Click to collapse
A kernel mechanism for Android power management. When a thread holds a wakelock, the kernel will refrain from entering a low-power state.
Basically, an app or process is not letting your phone sleep. Free app betterbatterystats can help you identify any rogue apps
Sent from my Blazing ET4G

tkemack said:
A kernel mechanism for Android power management. When a thread holds a wakelock, the kernel will refrain from entering a low-power state.
Basically, an app or process is not letting your phone sleep. Free app betterbatterystats can help you identify any rogue apps
Sent from my Blazing ET4G
Click to expand...
Click to collapse
Thanks for that suggestion! I shall install betterbatterystats and cpu spy and see what happens to my phone as i let it set over night. I've seen it drop by almost 20% in battery life overnight for some reason (~8hours)...which I find to be unacceptable.

[Q] 4.1.2 battery drain

Hi!
So I have updated my unrooted Note 2 to version 4.1.2 and below describes what happened:
1. Battery drain very fast, can't even last 24 hours. The battery details show "Android System" chugging all my battery juices.
2. On 2nd day, I tried "Factory reset" on Settings menu but still my battery drains very fast by "Android System".
3. On 4th day, I installed Kies on my PC and did the "Firmware Upgrade and Initialization". Noticed an improvement in battery life but after 4 hours, I noticed "Android OS" is now taking his turn to chug all my battery juices.
4. On 5th day, woke up and noticed battery drained >20% by "Android OS".
5. 6th day (today), I did another "Firmware Upgrade and Initialization" on Kies and now I noticed "Android System" took over and took over >29% battery usage in under 1 hour.
6. Now, I am running "Firmware Upgrade and Initilization" for the 3rd time and is hoping for the best.
Question:
Should I root my device and downgrade to 4.1.1? Before update to 4.1.2, it can last almost 2 days.
Thanks for your help!!

I had a similar problem and discovered that "gpsd" on my phone was causing the drain. This system also required other systems whiqh together used about 45% of the battery. The "gpsd" is the system samsung uses to track your phone (if you have enabed it). It did not cause this drain on my phone prior to the update.
I hope this helps.

Thanks...
Dmwitz said:
I had a similar problem and discovered that "gpsd" on my phone was causing the drain. This system also required other systems whiqh together used about 45% of the battery. The "gpsd" is the system samsung uses to track your phone (if you have enabed it). It did not cause this drain on my phone prior to the update.
I hope this helps.
Click to expand...
Click to collapse
Hey thanks for your input. Would you be able to explain in more details on how to disable this "gpsd" thing you mentioned?
I would like to try it out myself

I disabled all samsung apps, and several others including google now and location services.
Still a massive battery drain.
Very annoying..

it is said 4.12 drain faster than 4.1.1

bawffg85 said:
it is said 4.12 drain faster than 4.1.1
Click to expand...
Click to collapse
Much much faster
I hope Samsung fix this issue, and quick! I don't like my phone losing a minimum of 20% overnight.

I have no battery drain issues (yet) on the 4.1.2 could be just the vocal minority experiencing it or idk.

EarlZ said:
I have no battery drain issues (yet) on the 4.1.2 could be just the vocal minority experiencing it or idk.
Click to expand...
Click to collapse
How much battery do you lose overnight?

EarlZ said:
I have no battery drain issues (yet) on the 4.1.2 could be just the vocal minority experiencing it or idk.
Click to expand...
Click to collapse
On average I also don't observe a significant overall battery drain. Am currently projecting about 7-8 hours of screen time which is about the same as with before. Also having the same very low overnight drain.
However a few oddities:
Android system is higher on the battery charts than in 4.1.1.
I was playing nfs_mw before and after the update, and there is a significant increase in battery drain in 4.1.2. A full battery used to give over 4 hours of gametime, now gives just over 1 hour.
I've also not seem anyone else mentioning this and I'm not sure if this is related to battery but:
4.1.2 is absolutely perfect butter smooth
Every animation and transition had been completely fluid and going from 4.1.1 to 4.1.2 was like upgrading from 50% to 100% project butter.
Sent from my GT-N7100

HypoDest said:
I was playing nfs_mw before and after the update, and there is a significant increase in battery drain in 4.1.2. A full battery used to give over 4 hours of gametime, now gives just over 1 hour.
Sent from my GT-N7100
Click to expand...
Click to collapse
That's brutal. Were you able to confirm this over several days of gameplay ? Can you post screenshots of your battery stats screen?

fade2black101 said:
How much battery do you lose overnight?
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Click to collapse
Mine after upgrade to 4.1.2 took 7,5 hours during night to drain battery to 89%...
On 4.1.1 it was about 3 - 4%. I'm downgrading...

emotion rom 2.0 is the solution

nabilsweet007 said:
emotion rom 2.0 is the solution
Click to expand...
Click to collapse
why is that?

I have downgraded but version 4.1.1 doesn't give me the option to switch to 2G only data mode!! Only 2G/3G/4G or 3G only!
This is essential as where I live my 3G keeps cutting out, and I get frequent loss of service. Is there any way to get this option back???

Roughly about 1% per 7-8hours depending on the current battery level, are you losing more ?

I downgraded to 4.1.1 by downloading the appropriate firmware from sammobile.com and flashing as pda with odin. I then flashed the perseus kernel which has the sudden death bug fix built in. Perseus is not prerooted but it doesn't have to be, at least it protects the phone from sudden death as I had the faulty chip in mine. I got 40 hours standby and 4 hours screen on out of it now, all accounts syncing with Google now and Samsung tracking service. happy to have switched back to 4.1.1, all I miss is the snappier s note from 4.1.2.
Sent from my GT-N7100 using xda app-developers app

Hello guys I have this problem also In my note 2 after updating to 4.1.2 my battery drain like 10% for 20 min in idle
Factory reset dosen't solve the problem
I just wipe data and cache from recovery mode beleive me now its better than before I am using it for 1 day 14 hours I still have 49% on heavy usage with H+ connection
Sent from my GT-N8000 using xda premium

Hope it get fixed soon...
Last night I disabled "Google Location Services". It is under Settings > Accounts > Google > Location Settings
This is what I noticed.
Before I sleep, after I finished charging at 16min my Android Services spiked up almost 50%...
When I woke up, this is what I saw... 9% total drain and Android Services went up to 54%...
Not too bad comparing to a few days ago when I first updated.
So is there anything I can do without needing to root my phone?
Thanks!

hannarecord said:
Hello guys I have this problem also In my note 2 after updating to 4.1.2 my battery drain like 10% for 20 min in idle
Factory reset dosen't solve the problem
I just wipe data and cache from recovery mode beleive me now its better than before I am using it for 1 day 14 hours I still have 49% on heavy usage with H+ connection
Sent from my GT-N8000 using xda premium
Click to expand...
Click to collapse
I have the same problem like You

Can confirm this issue. Used to get 5-6 hours screen on time on 4.1.1 on a normal day (moderate to heavy usage).
Now I can't even reach 3 hours on 4.1.2. I already did a hard reset. No change.
Can installing a custom ROM solve this?

Android System and Android OS draining my battery since updating to 4.1.2

Bone stock, not rooted or rommed.
My battery life used to be phenomenal. I would check at the end of basically every day and averaged 4-8 hours of actual Screen On time. The Screen would account for 40-55% of the usage, followed by all of the*apps*that I had used that day. Android System and Android OS would be pretty far down on the list.*
Now that I have 4.1.2, I'm lucky to hit 3 hours of Screen On time. And now Screen, Android System, and Android OS are accounting for 20% EACH.
I haven't changed any settings or the way that I used the phone. The only thing that has changed is the update.*Is anybody else experiencing this?

I've gotten bettery battery life since 4.1.2, significantly better. Try to perform a factory reset or it could be a faulty device.

Dekz said:
Bone stock, not rooted or rommed.*
y battery life used to be phenomenal. I would check at the end of basically every day and averaged 4-8 hours of actual Screen On time. The Screen would account for 40-55% of the usage, followed by all of the*apps*that I had used that day. Android System and Android OS would be pretty far down on the list.*
Now that I have 4.1.2, I'm lucky to hit 3 hours of Screen On time. And now Screen, Android System, and Android OS are accounting for 20% EACH.
I haven't changed any settings or the way that I used the phone. The only thing that has changed is the update.*Is anybody else experiencing this?
Click to expand...
Click to collapse
Yep and I have more or less tried everything including tweaks galore, every suggestion I coukd find, and freezing several dozen apps.
Nothing can be done about this and my guess is Samsung have made an absolute mess of the update. My HTC loses maybe 1% overnight on a bad day, this loses way over 10%.
I'll prob end up switching back to 4.1.1 but unfortunately it doesnt have the tap to reflow feature in the browser (which I use a lot)... I wonder if I can remove it via titanium and restore the newer version which would have reflow on 4.1.1 ??

I have the same problem. As soon as I took my phone off the charger this morning it dropped to 99%. On 4.1.1 it used to last for a good 20 minutes before dropping to 99%. Also last night after about 6 hours of screen time Android System was at the top of my list. And that is with 20 or so system apps frozen or deleted from running.

What's the easiest way to go back to 4.1.1?

Dekz said:
What's the easiest way to go back to 4.1.1?
Click to expand...
Click to collapse
Odin pc or mobile pc.. but if your rooted.. it is safer to use mobile odin it is faster and will avoid power outrange
sent from GODFATHER Gt-N7100
ARHD V10 with REDPILL KERNEL

Is there any way to get the browser from 4.1.2 onto 4.1.1? Titanium backup doesn't seem to restore system apps.

Zero battery life related issues here with 4.1.2 Im starting to think some people probably messed up their phones too much or just got a flaky unit/battery and 4.1.2 exposed those?

EarlZ said:
Zero battery life related issues here with 4.1.2 Im starting to think some people probably messed up their phones too much or just got a flaky unit/battery and 4.1.2 exposed those?
Click to expand...
Click to collapse
Well I dunno.. I have tried everything and there is definitely a battery drain issue. If it is caused by ebay/whatsapp + facebook, then I'm curious as to why they don't show up in battery usage or betterbatterystats... and I'm also curious why the exact same setup on my HTC EVO 3D does cause these horrendous idle battery drains.

fade2black101 said:
Well I dunno.. I have tried everything and there is definitely a battery drain issue. If it is caused by ebay/whatsapp + facebook, then I'm curious as to why they don't show up in battery usage or betterbatterystats... and I'm also curious why the exact same setup on my HTC EVO 3D does cause these horrendous idle battery drains.
Click to expand...
Click to collapse
Hmm, have you tried using betterbatterystats found here at XDA? It should show you whats keep the phone up.

EarlZ said:
Hmm, have you tried using betterbatterystats found here at XDA? It should show you whats keep the phone up.
Click to expand...
Click to collapse
Yeah already done all that and there doesnt actually seem to be anything using over like 5%.. I have elimated the higher one yet it still drains ovwr 10% at nite. Or in general idleness.
What I became accustomed to with my previous phones was 0% or 1% drain over many hours if the screen was off. Not 2% or more an hour.

1% drain over 9 hours of deep sleep on Wanam2.8
Sent from my GT-N7100 using xda app-developers app

I had the same dreaded android os battery drain issue after updating to ma8. Used to have great battery life before that. After freezing Google search, Google now, still no use. Then i realized I installed another weather app at the same time I upgraded the os. Bingo. Un installed that offending app and that fixed the Android os battery drain issue. Hope this helps.

http://forum.xda-developers.com/showthread.php?t=2107312
That's specifically my DBT rom (stock everything as well) and I've had battery issues and to be honest, it's still better than most other phones, but I'm getting about 40% less life out of my device now.
I have flashed again, I've reset, and deleted everything and still no luck. It's something with the ROM. I hope the next update will fix it. If it doesn't, I'll revert back to 4.1.1 because I would go to bed with 50% battery life, now I have to charge in the middle of the day if I want to get through a long work day with lots of use.

well the new french 4.1.2 N7100XXDMA6_N7100OXADMA5_N7100XXDLK7 is much better than the last one rlsd in december and my battery drains less now

UtkarshGupta said:
1% drain over 9 hours of deep sleep on Wanam2.8
Sent from my GT-N7100 using xda app-developers app
Click to expand...
Click to collapse
I have the LTE version so not many choices of custom roms unfortunately.

downgraded to 4.1.1
well i upgraded my note 2 to latest 4.1.2 from 4.1.1 few days ago and battery drain issues started .. i hard reset it many times but same problem.. before update with usage on whatsapp 1% drop down was in 7-8 minutes and after update it was in 4-5 minutes..
so today i downgraded to 4.1.1 again and battery is same like before update again.. cheers..

But you are on the risk of losing your phone itself due to sds
Sent from my GT-N7100 using xda app-developers app

UtkarshGupta said:
But you are on the risk of losing your phone itself due to sds
Sent from my GT-N7100 using xda app-developers app
Click to expand...
Click to collapse
I'm on 4.1.1, to be exact wanam 1.5 and when I test using emmc check my chip is sane and I passed the test. Should I be worrying about sds?
Sent from my GT-N7100 using xda app-developers app

i also have same problem on XXDMB2 .i think only some people have battery problems with 4.1.2. Is it related to emmc firmware 0*1f ? Is the kernel reparing the bad sectors by itself? and what is kworker process?

Stock ROM battery drain

Hey guys,
I have been experiencing bad battery life on the latest 19S ROM, i also experienced same on 18S stock.
When i go to battery and view the stats. i always get ANDROID OS which is taking most of the battery life. This is annoying because it seems that it is reducing my usage time.
I read online that it is an app which is causing the OS to remain awake. I have to manually reset the phone maybe 2 to 3 times daily to prevent heavy battery drain.
Can anyone help me to solve this issue?

I deleted the TypeApp email app and had a big difference in battery, it gave me 5x as many wakelocks as anything else

A also have battery drain. Android OS is on top.. Any fix?

joevik said:
Hey guys,
I have been experiencing bad battery life on the latest 19S ROM, i also experienced same on 18S stock.
When i go to battery and view the stats. i always get ANDROID OS which is taking most of the battery life. This is annoying because it seems that it is reducing my usage time.
I read online that it is an app which is causing the OS to remain awake. I have to manually reset the phone maybe 2 to 3 times daily to prevent heavy battery drain.
Can anyone help me to solve this issue?
Click to expand...
Click to collapse
Where did you get the 19s rom from? the Letv website here http://bbs.le.com//zt/eui/le_pro1.html only shows 18s as latest?

High Kernel (Android OS) & Android System BATTERY CONSUMPTION

I have been suffering this issue since I updated to N (screenshots attached).
Atm, SOT is about 3 hours.
Are you guys experimenting this battery drain caused by this two processes too?
In case this also happened to you. Were you able to solve it?
I installed latest RUU 2 days ago and nothing seems to have improved.

Your kernel and android system usage look OK to me... Google services are OK too IMO. Looks like you've used chrome and YouTube a bit.. Awake time up a little, that would be mainly from apps running in the background. You could try servicely to try and improve that...
Sent from my SM-P605 using Tapatalk

jbm76 said:
Your kernel and android system usage look OK to me... Google services are OK too IMO. Looks like you've used chrome and YouTube a bit.. Awake time up a little, that would be mainly from apps running in the background. You could try servicely to try and improve that...
Sent from my SM-P605 using Tapatalk
Click to expand...
Click to collapse
It doesn't look ok to me. Comparing it with the phone i use for working, it seems there is a problem in here.
As i was saying, the phone i use for working averages 10% combined kernel+android os consumption while my htc 10 averages 30%+.

I have the exact same issue. I just unplugged my phone and I'm already down 3%.
Sent from my HTC 10 using Tapatalk

Jyro275 said:
I have the exact same issue. I just unplugged my phone and I'm already down 3%.
Sent from my HTC 10 using Tapatalk
Click to expand...
Click to collapse
Why not use Better Battery Stats, let the phone sit idle for 6 hours, download the dump file to your SD, and see what exactly is killing your battery.
There are too many variables to test your device reliably while it's in use. With GSAM, all you see is what's happening while the device is in use, and what 'Eats' your battery, but no 'Why' your battery life is poor, is it background processes/ notifications/ poor reception/ bad Wi-fi??
GSAM creates a guessing game. Logs never lie. If your battery is going bad, it will be reflected in your log(s).