Develop Bugs

[Q] About calibrating battery, also about Gingerbread battery life.

Last night I switched over to the EF02 Gingerbread leak and flashed the AA i3 rom.
I was loving it, but my battery went down about 15% in 20 minutes. Just while going through menus.
Browsed around a bit and found out about calibrating the battery, and how it can fix the issue.
So, my questions:
- Should I calibrate from a full charge?
- Is it a good idea to calibrate the battery every once in a while, just for the sake of it?
- What kind of battery life have some (any) of you seen out of the AA i3 rom with a properly calibrated battery?
Thanks in advance.

toweringflesh said:
Last night I switched over to the EF02 Gingerbread leak and flashed the AA i3 rom.
I was loving it, but my battery went down about 15% in 20 minutes. Just while going through menus.
Browsed around a bit and found out about calibrating the battery, and how it can fix the issue.
So, my questions:
- Should I calibrate from a full charge?
- Is it a good idea to calibrate the battery every once in a while, just for the sake of it?
- What kind of battery life have some (any) of you seen out of the AA i3 rom with a properly calibrated battery?
Thanks in advance.
Click to expand...
Click to collapse
calibrating the battery is just a placebo effect in my opinion...i don't think it will help you at all
my personal experience with ef02 is it tanked my battery in 5 hours from 100% to dead
i'd recommend sticking with ec05 until we get a newer leak or official gb

go to market and look for battery calibrator and then i t will tell you directions from there

Could be ROM. My wifes epic is deodexed ef02 w ef02 modem and a few odds and ends and we are seeing 12hrs on a charge. When it was same ROM and ec05 modem...it made it 4.5 hrs w hardly any use and died.

Rodderik said:
calibrating the battery is just a placebo effect in my opinion...i don't think it will help you at all
my personal experience with ef02 is it tanked my battery in 5 hours from 100% to dead
i'd recommend sticking with ec05 until we get a newer leak or official gb
Click to expand...
Click to collapse
That was kind of the suspicion I had...something sounds kind of off about "calibrating battery".
Even if the leak was making it 12 hours, I'd still have switched back to EC05 2.2 on SRF 1.2...which I already did. I'm very content with a reliable 20+ hrs.
Was fun to toy with though, definitely left an impression as far as things to look forward to. I'll keep waiting for a more stable/official...

Also, root explorer. Data/system/battery stats.bin. delete that file after full charge, meaning full charge, unplug, plug back in for 15ish mins. Reboot. Simple. You will be deleting the battery statistics manually and upon reboot it creates a new file. If you are paranoid about properly doing it that will do it.

Rodderik, nice to see that name more often again.
Help support autism awareness,it only takes 2 seconds to help make a difference...
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Sent from MyEF02 using XDAPA...

Rodderik said:
calibrating the battery is just a placebo effect in my opinion...i don't think it will help you at all
my personal experience with ef02 is it tanked my battery in 5 hours from 100% to dead
i'd recommend sticking with ec05 until we get a newer leak or official gb
Click to expand...
Click to collapse
I had great battery life on EF02 Plus.
http://forum.xda-developers.com/showthread.php?t=1130117
I just went back to SRF 1.2 to try it out might go back to EF02 Plus. No knock against SRF1.2 it is great ROM.

Make sure your phone is in deep sleep mode.
toweringflesh said:
Last night I switched over to the EF02 Gingerbread leak and flashed the AA i3 rom.
I was loving it, but my battery went down about 15% in 20 minutes. Just while going through menus.
Browsed around a bit and found out about calibrating the battery, and how it can fix the issue.
So, my questions:
- Should I calibrate from a full charge?
- Is it a good idea to calibrate the battery every once in a while, just for the sake of it?
- What kind of battery life have some (any) of you seen out of the AA i3 rom with a properly calibrated battery?
Thanks in advance.
Click to expand...
Click to collapse
I am current running the Bonsai Rom 5.0.0.B12 and I am greating great battery life. Make sure there is nothing that is preventing your phone from going into deep sleep mode. Background data, also make sure that your cpu settings are on conservative. I use voltage control to change my cpu setting to conservative and noop and I use cpuspy to determine if my phone is going into deep sleep mode. If you do these thing you should get great battery life.

A rant about my experience with the Verizon Galaxy Nexus. HELP!!

Let me start off with the good in this rant. This device is BEAUTIFUL and has A LOT of potential. Considering i just rooted it, it is even more fantastic BUT (there is always a "but" in life) here are my issues that i PRAY would go away. For some odd reason, though i have done everything i can to prevent it from happening, the battery life is just terrible! And here is the mind blowing part: My brightness is always at about 15-30 percent, my automatic sleep is at 15 seconds, i am never on 4G, NFC is off and my GPS is almost, always off. I recently learned that having a lot of black (Wallpaper, themes or simply a black display) going on prevents the display from eating up battery, therefore i've blackened what i use most (MMS, Gmail, Instagram and of course a black wallpaper) but after all of that, the battery still tends to suck major ball sack (sorry for the vivid image). If you must know i am using an AOKP rom, Jelly bean. I absolutely love the rom.
On behalf of that rant ^ .. Is there anything anyone could/would suggest i do in order to have a better experience with battery? Maybe a different rom that revolves around better battery life? Anything that i am missing to prevent battery from draining so fast? AM I THE ONLY ONE GOING THROUGH THIS?!
Last but not least, what gets me going and makes me want to punch something is the fact that my phone constantly, CONSTANTLY heats up for NO REASON (i'm assuming theres an actual reason but i have no idea what it is). After a full charge, i'd unplug the device and couple mins in after browsing web for like 60 seconds and texting, it'd start burning on the top of the screen and the back where the camera is. What is that all about?
And on behalf of that second rant ^ .. is there a solution for that? AM I THE ONLY ONE GOING THROUGH THIS?! lol
:crying::crying::crying::crying::crying::crying::crying::crying::crying::crying::crying::crying::crying::crying::crying::crying:
Check out what my battery looked like after a few mins from unplugging it. Screen, 67% ??????

Believe it or not... I had a battery go bad already on me. Now i was short charging it and stuff like that.. but still. The early builds weren't as efficient as this one is. You might try a new battery. Or the oem extended one. I have had good luck with both routes. Oh, and i'm stock.

Lots of battery drain and a hot phone means that it's trying to do something. Looking at your screenshot, you're not having any signal problems, which would lead me to believe it's a rogue app. What was your total screen on time during that 48 minutes?

Cilraaz said:
Lots of battery drain and a hot phone means that it's trying to do something. Looking at your screenshot, you're not having any signal problems, which would lead me to believe it's a rogue app. What was your total screen on time during that 48 minutes?
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Click to collapse
i honestly don't remember, i THINK it was probably 32 mins because thats what i see every time i see the battery that way. If that makes any sense.

Which kernel are you running with that rom? I had a JellyBean rom with a kernel that increased overall, but my phone would often heat up and battery life was not the best. Changed roms and kernel and everything is cool now.

jeremyt727 said:
i honestly don't remember, i THINK it was probably 32 mins because thats what i see every time i see the battery that way. If that makes any sense.
Click to expand...
Click to collapse
32 minutes of screen on being 29% of your battery. That makes roughly 110 minutes of screen on for the entire battery. Running a stock battery? I never did, but I think people have said 2 hours screen on is the low end for a normal battery. I could be wrong, though.

LGeX said:
Which kernel are you running with that rom? I had a JellyBean rom with a kernel that increased overall, but my phone would often heat up and battery life was not the best. Changed roms and kernel and everything is cool now.
Click to expand...
Click to collapse
Heres a screenshot of the info :

2 hrs is the low end for OEM battery? I'm lucky to get over an hour and a half on OEM extended. GNex battery is unbelievably horrid.

mursepaolo said:
2 hrs is the low end for OEM battery? I'm lucky to get over an hour and a half on OEM extended. GNex battery is unbelievably horrid.
Click to expand...
Click to collapse
Or the high end. I got mine as a replacement device for the Droid Charge, so I had to order a battery and back cover when they offered it to me. Since VZW had a 50% off sale on the 2100mAh battery and back, I went with that. So I've literally never used the standard OEM battery with the phone.

Try going to this link: http://minooch.com/franciscofranco/Galaxy Nexus/JB/Jelly Bean/
and downloading "franco.Kernel-r225-384GPU.zip" flash it in recovery like you would a normal rom. Franco's kernel is extremely stable and works magic for good battery life. Should also resolve your overheating issue. If not, I'd suggest a full wipe and installing a different rom.

LGeX said:
Try going to this link: http://minooch.com/franciscofranco/Galaxy Nexus/JB/Jelly Bean/
and downloading "franco.Kernel-r225-384GPU.zip" flash it in recovery like you would a normal rom. Franco's kernel is extremely stable and works magic for good battery life. Should also resolve your overheating issue. If not, I'd suggest a full wipe and installing a different rom.
Click to expand...
Click to collapse
Terrific! So no need for a data/cache wipe? I can flash this over the current ROM I'm using? Backup I'll do of course but yeah.

jeremyt727 said:
Terrific! So no need for a data/cache wipe? I can flash this over the current ROM I'm using? Backup I'll do of course but yeah.
Click to expand...
Click to collapse
I normally wipe cache, not sure if it's required. But yeah, it's not a new rom or anything, just different kernel to test out and see if the kernel is what was causing your battery issues.

I'm using the jbsorcery beta with the lean kernel and under clocked with the modded voltage and this is heavy usage on Facebook and texting and about 30 min on the phone I have about 2hrs 45min and im at 80%
Sent from my Galaxy Nexus using xda premium

VERY HIGH Batterydrain on CM7.2

Hi,
like the titel said, i experience huge batterydrain on CM7.2 RC2/133.
I am using the stock CM7 kernel that comes with the rom. I reflashed it several times but not much changed!
At first my device didn't go into deep sleep, but since the last reflash it does.
Over night i loose ~10% ... flightmode is activated.
After 1,5 day's the battery is empty... even if i dont use the phone. Wifi/3G/bluetooth etc. are allways OFF.
I also untervolted the device but nothing changed.
I am charging my battery at the moment, so i can't post any betterbatterystats log's. But i will in some hours!!
Basically my question is, which kernel do you use? What kernel can i use on CM7.2? Are there any better ROM's when it comes to batterylife/performace?
PS: i never flashed baseband or wifi modules etc. when i installed CM7.2... just did as it said in the "how to install CM7.2".

Try this.
1. Empty your battery.
2. Charge your battery for 6 - 8 hours.
3. After that remove battery stats.
I tried this as I'm having battery drain on NXT ROM. Before that my battery can only stand for one day then need to recharge. After doing this, my battery still have 50% after a day of usage.

Just saying, it has been confirmed that removing the battery stats does absolutely nothing.

so should i try another kernel? Which fits for CM7.2 best?

ridder215215 said:
Just saying, it has been confirmed that removing the battery stats does absolutely nothing.
Click to expand...
Click to collapse
My friend taught me this lol. He even showed me a YouTube video.
Somehow it worked.
Sent from my awesome Xperia Play

You really should upgrade to CM9 unless there is a reason you're holding back.

Battery usage of android 4.1

I switched to jellybean (android 4.1) recently. The system is great. However it drains the battery much more than cm7. During a night the battery can reduce from 80 to 60. Is it normal? If not is there solution to extend battery usage?

Unfortunately, that is normal. Turning the fire off can save the battery, but I just charge it everyday. Compared to rooted stock, battery usage increases between 10 and 20 percent for me under normal use.
Sent from my Amazon Kindle Fire using xda app-developers app

wonderow said:
I switched to jellybean (android 4.1) recently. The system is great. However it drains the battery much more than cm7. During a night the battery can reduce from 80 to 60. Is it normal? If not is there solution to extend battery usage?
Click to expand...
Click to collapse
+1
According to Better battery stats, most of the drain on my Kindle is caused by AudioOut2 wakelock. I failed to resolve the issue and i'm not sure what is causing it. I would like to know if anyone else experienced similar issues.
IMHO, it must be sort of a bug since JB is fairly new and devs need time to resolve all the issues.

loCe45 said:
+1
According to Better battery stats, most of the drain on my Kindle is caused by AudioOut2 wakelock. I failed to resolve the issue and i'm not sure what is causing it. I would like to know if anyone else experienced similar issues.
IMHO, it must be sort of a bug since JB is fairly new and devs need time to resolve all the issues.
Click to expand...
Click to collapse
Same exact issues here. And I agree that it will (hopefully) get ironed out over time.
Sent from my Amazon Kindle Fire using Tapatalk 2

I don't seem to seem that terrible of battery life with mine. I'm running twa_priv's cm10 and during the night it might go down about 7-10 percent. I do have Wi-Fi off while in sleep which helps.

Shredder87 said:
I don't seem to seem that terrible of battery life with mine. I'm running twa_priv's cm10 and during the night it might go down about 7-10 percent. I do have Wi-Fi off while in sleep which helps.
Click to expand...
Click to collapse
That's not normal for a standby... it should be <5% ...not the mention that device does not have to communicate with 2G/3G networks (unlike smartphones), and on my smartphone i get average of about 3days (medium usage, light on wifi) without recharging
It's a bug - some process prevents device to go to sleep (aka. wakelock) which causes drain. I expected at least 2-3 days on a single battery charge, and tbh, recharging it daily is little bit disappointing Something tells me it's a kernel bug since i encountered it on every CM10 rom so far :S

loCe45 said:
That's not normal for a standby... it should be <5% ...not the mention that device does not have to communicate with 2G/3G networks (unlike smartphones), and on my smartphone i get average of about 3days (medium usage, light on wifi) without recharging
It's a bug - some process prevents device to go to sleep (aka. wakelock) which causes drain. I expected at least 2-3 days on a single battery charge, and tbh, recharging it daily is little bit disappointing Something tells me it's a kernel bug since i encountered it on every CM10 rom so far :S
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Click to collapse
Well coming from an previous ICS build it's a major improvement. Typically the battery life from ICS builds(That I used, Energyrom, AOKP Kindle Edition, GedeRom) would drain 20-30% nightly like the OP said, so coming from there it seems like JB fixed whatever was killing the battery. I can probably go a week with light usage on my kindle before I recharge it. ICS in general drains the battery on any device. I used to get 5 days on my Droid 1 running CM7. With ICS I'll go through 3, though I never want to go back to Gingerbread, hahahaha.

Shredder87 said:
Well coming from an previous ICS build it's a major improvement. Typically the battery life from ICS builds(That I used, Energyrom, AOKP Kindle Edition, GedeRom) would drain 20-30% nightly like the OP said, so coming from there it seems like JB fixed whatever was killing the battery. I can probably go a week with light usage on my kindle before I recharge it. ICS in general drains the battery on any device. I used to get 5 days on my Droid 1 running CM7. With ICS I'll go through 3, though I never want to go back to Gingerbread, hahahaha.
Click to expand...
Click to collapse
My record for battery on a smartphone is 6 days... using ICS
Anything that drains battery more than 1% in 1.5/2 hours in standby is bad, no matter what OS version...

I also have the impression that on a fully working Jellybean ROM, battery usage is more intense than on a stock ROM. I still prefer the advantages of the new ROM, and also charge daily. Being mobile, I use the XTPower MP-10000 Powerbank, which gives more than enough battery life and charges the kindle while in use to 100% full. This has resolved the issue of battery drainage for me.

[Q] Need VZW rom with good batt life.

A few months ago I had paranoid rom that was great on batt life. 3% loss from midnight till 6am.
I was blown away that I could use this phone so much and it hardly ever drain batt.
Kept telling me there was an update so I did and battery life went to hell...
Tried some others, Aokp and now liquid smooth. LOVE the Liquid smooth, but 25% over night is un-acceptable. this thing on the last few roms is constantly needing charged.
I tried restoring that one version of paranoid, but just wasnt the same.
so curious on suggestions on a better ROM or something.

There is no answer to this question. Different people have different preferences and experiences. If there was a ROM that was clearly better than the others, almost everyone would likely be running it.
Your best bet is to find out why your battery is draining. Use something like Better Battery Stats to figure out what apps may be draining your battery. Perhaps it is an app or two that is synchronizing a lot. Perhaps there are wakelocks.
Alternatively, it could also be hardware. Perhaps the battery is dying. Perhaps the USB port is having issues, and it wakes the device/screen up from time to time.

thanks cup... i just wiped and put that old one back on... will check it tonight. then ill put that better batts stats on.

ShannonPricePhoto said:
A few months ago I had paranoid rom that was great on batt life. 3% loss from midnight till 6am.
I was blown away that I could use this phone so much and it hardly ever drain batt.
Kept telling me there was an update so I did and battery life went to hell...
Tried some others, Aokp and now liquid smooth. LOVE the Liquid smooth, but 25% over night is un-acceptable. this thing on the last few roms is constantly needing charged.
I tried restoring that one version of paranoid, but just wasnt the same.
so curious on suggestions on a better ROM or something.
Click to expand...
Click to collapse
You may want to start with trying a different kernel and see if that helps.
http://forum.xda-developers.com/showthread.php?t=2115590