Develop Bugs

[Q] severe battery drain

I finally gave in and rooted my phone after researching it thoroughly. I used unrevoked to root and have flashed fresh 3.4.0.1 and netarchy 4.1.9.1 and am using set cpu, too. but my battery drain is just as bad before I rooted.
before the last OTA and before root, i could get a good 14 hours with moderate use and time without signal was lower, but now it seems my time without signal is rather high(i do get lousy coverage in my house, but outside its great), and i am sure that may be the main culprit of my battery drain. I am usually lucky to get 8 hours now.
My question is there an app that works reliably to prevent such a heavy drain because of the searching for a signal, without going straight to airplane mode. or is there something i may have missed rooting it and should check some settings? I was hoping to get it back up to 14-16 hours of battery life with rooting it.

I'm curious too and switching to wifi when wifi works helped my battery alot. But still my battery is like 12hrs then dead.
Sent from HTC EVO 4G via xda app

I havent seen an app that does this. I am curious though because unless you are in your home a significantly more amount now then you were pre root you still shouldnt see that big of a drop in battery time from signal.
how long ago since you last wiped data on the phone (probably last time you flashed)?
did you recalibrate your battery after flashing?
did you reset up all your settings to optimize battery?
are you using the HAVS version of Netarchy's kernel?
i know lots of questions but these would greatly help on what you have already tried and what you can still try.
I am also running Fresh 3.4.0.1 at the moment testing it out and i have gotten the best battery life out of it using the No HAVS netarchy kernel and the collins battery tweak set up WITH OUT setCPU. I also use the paid version of juice defender (ultimate juice) and have that set up to drop data connection while the screen is off. I am normally in the heavy user area but lately have been busy so have slipped down to the moderate level and i can still easily get all day (about 14 hours).
If you are a true heavy user i would expect 8-12 hours of battery life, mid user 12-16 and as a very light user your milage may very greatly. I am assuming since you previously fell into the 14-16 hours your a moderate user. if thats the case you should def be able to get back to that.

I did not recalibrate the battery. Is that done through the recovery menu? And should the battery be fully charged?
I am still learning about roofing and what I can do and should be doing.
Sent from my PC36100 using XDA App

Even after rooting and wiping battery stat again, it's still barely scraping 6-8 hours(with auto starts and juicer defender on)
Sent from HTC EVO 4G via xda app

Turn off latitude, in google maps.

I found this app on app brain, green power premium, (can't link since i am a new user on xda) and tried it out last nigt on a full charge before i left for work, about 13 hours later i just got the warning to plug in my phone.
basically it manages your wireless networks within your parameters you can set instead of manually turning off networks, etc...and that was one of my main issues of battery drain.

Calibrating your battery should help out.
Sent from my FroYoed Sprint Hero

How much does calibrating your battery help?
Sent from HTC EVO 4G via xda app

.....,,,,,

11 hours of moderate to light use (about 3.5 hrs of awake time) and the battery has 64% left.
so I flashed from fresh 3.4.0.1 to myn's warm TwopointTwo (RLS3)
and went from netarchy 4.1.9.1 cfs havs kernal to Kings #11 with havs and cfs.
I am using setcpu (all on demand profiles): screen off 384 max/245 min, battery <50% 614/245, temp >40.8C 614/128, and Charging/Full with 998/384
and the other app I am using is called Green Power (i am using the paid premium version) my settings on it are Managing Mobile Network Only. Keep wireless on if power is on, Keep wireless on if screen is on, Check traffic before shutting wireless off and start up at boot, Durations ON 1 min - OFF 10 min.
I am rather happy with this setup so far, and really digging myn's rom. i loved FRESH, but mostly because i spent months just using stock sense and got so use to it, switching to FRESH when I rooted felt natural.

Cm7 with setcpu??

Does setpcu really work? With making battery better. I have it set with profiles just not sure if its really helping or making it worse.
Sent from my PC36100 using XDA Premium App

I dont think it is really needed with the CPU settings in CM7 now. Does the same thing for the most part im guessing?

you can do baisic clock scaling from within cm7 settings. as for profiles, if you have a custom kernel and run smartass (on tiamat) or savagedzen (on savaged-zen) governers, you shouldn't need it. those governers do basically the same thing, just smarter.

I was wondering the same thing. On sense roms with setcpu I could easily go a whole day and still have 50% battery left. With cm7 I can only go about 14 hours before its completely dead. The odd thing, I have a profile in setcpu to lower the speed to 245 (the min) below 50%. On sense, I can totally notice it slow down, and can totally notice the battery draining much slower below 50. With cm7, I don't notice any slow down and the battery will actually drop quicker below 50, much quicker than if the battery is above 50. I am using whatever kernal cm7 came with
Sent from my PC36100 using XDA App

sitlet said:
I was wondering the same thing. On sense roms with setcpu I could easily go a whole day and still have 50% battery left. With cm7 I can only go about 14 hours before its completely dead. The odd thing, I have a profile in setcpu to lower the speed to 245 (the min) below 50%. On sense, I can totally notice it slow down, and can totally notice the battery draining much slower below 50. With cm7, I don't notice any slow down and the battery will actually drop quicker below 50, much quicker than if the battery is above 50. I am using whatever kernal cm7 came with
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Try using Tiamat or SavagedZen. I get great battery life on both. You would definitely benefit more from an SBC kernel, but you will still get better battery life with the non-sbc builds of those kernels as well. Which you choose is up to you. Despite a bad name, most users have no problem with SBC kernels. However, the risk is still there. I'll take my battery possibly pooping out early for the extra hours I get out of SBC.
Once you've flashed whatever kernel you want to use, set the governor to smartass (or SavagedZen, if that's what you're using).

CM7 Battery

Hello I just flashed my phone to CM7 and it's so smooth, but I was wondering if I could get the.most our of my battery by using a different kernel. That allows everything to work. please help.
Sent from my PC36100 using XDA App

oehwarieme said:
Hello I just flashed my phone to CM7 and it's so smooth, but I was wondering if I could get the.most our of my battery by using a different kernel. That allows everything to work. please help.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Tiamat kernel plays nice.
It can also be undervolted additionally.

Right now I'm running CM7 Stable, and I use the Savage Zen kernel (no SBC). I get pretty decent battery life out of it by using SetCPU and setting it to 245 min/max when the screen is off and around 245-1000~ when it's on; this allows me to get great performance while still maintaining decent battery.

savaged zen 2.0.0. my phone's been through 2 nights. played quite a few games. checked facebook a bunch. used flashlight a few times. email, xda, calls. 1 day 11 hours and still like 10 percent left. runnign on savaged zen governer. that's pretty damn good.
then again, i did fall asleep wiht it on and not charging twice. at least we know it sleeps well...

played with the SZ governor for a little bit the other day, and found it pretty nice.
ended up switching back to tiamat and smartass though.
also currently testing and trying out SBC just to see how it behaves. easily noticing that extra percentage of battery that gets pushed to charge due to the trickle charge vs a non-SBC kernal.

I'm visitng here from the Samsung Captivate forum. I flashed CM7 to my girlfriend's EVO last night and she is experiencing horrid battery life. I turned off the "back up to google" options in the privacy menu that is said to be starting Android system every time the dialer is used, which is said to use up excessive battery power.
I'm about to flash tiamat's latest kernel. I'll report back on how it goes.

I flashed back to CM7 the other day. I was having issues, so i completely reformattetd everything. Went back to stock, unrooted, re-roooted, and flashed cm7. I'm getting great battery life with CM7 + the tiamat kernel.
As of right now: 25 hours, 19 minutes of uptime with 68% of my battery life remaining.
ETA: This is using the 3500mah seido extended battery.

My girlfriend is getting much improved battery life with tiamats 3.3.7 kernel
Sent from my GT-I9000 using XDA App

i'm on Kings Unleashed GBR3 NEON-CM7 using tiamat 3.3.7 sbc kernel and i love it! i am getting almost 35hrs on one charge!

[Q] Maximize Battery Life

Hey there,
I want to know what is the BEST setup to maximize battery life. What ROM? What Kernel? What UnderVolt ( if any )? What Radio?
My room mate has an iPhone that he modded and it now lasts two days without being charged and that's with moderate usage. I'd like to out do him with my Android. Any help?
-Reiz

So far personally I've had the best experience with the following :
ROM : CM7 ( 7.0.0 )
Kernel : Tiamat 2.6.32.27
Radio : 11.19
I can't seem to get undervolting to work since I don't have the folder that Viper describes even though I am using an AOSP rom ( as far as I know ) . o.o It's odd really... Anyways, that usually gets me about 20 hours of usage or so .

Twenty hours isn't bad, as the Incredible isn't known for it's battery life. You won't get what your roommate's getting with his phone, maybe get a bigger battery...? I don't think you're going to really out do yourself with the experience you've posted, I'd be happy with that.
I am running SkyRaider 4.0, Chad's 12232010 kernel, OC'd to 1.0368 (small OC, I know) with the leaked 04.08 radio, and I can get about 20 - 24 hours before charging, low to moderate usage (no games, emails for work/personal, maybe 1 call of 5 minutes, lots of web browsing).

Cm7 stock kernal. On metro pcs with a seidio 3500 mah extended battery. Unplug at 7am 12 hours later only sitting on 74% lmao. And in that time bout 100 text. And 200 work emails.. and 30 mins of surfing on lunch. This setup has been the best for me on bat life.. used to run sense and my bat life would just suck..
Sent from my ADR6300 using XDA Premium App

your screen is sucking your battery down
Reizvoller said:
Hey there,
I want to know what is the BEST setup to maximize battery life. What ROM? What Kernel? What UnderVolt ( if any )? What Radio?
My room mate has an iPhone that he modded and it now lasts two days without being charged and that's with moderate usage. I'd like to out do him with my Android. Any help?
-Reiz
Click to expand...
Click to collapse
Two things that will kill your battery faster than anything:
-Anything that syncs
-your screen
So, turn your brightness and screen timeout down and turn off anything you don't need syncing all the time, or at least turn the sync frequency down.
Also, keep your wifi, vibration, tactile feedback, and gps off unless you really need it.
Kernels, roms, undervolting...no where near as effective.
Think about your phone as a smaller version of a laptop (which it pretty much is), what's going to save you the most energy: throttling your cpu speed, or turning the screen brightness down?
Much love brother

[Q] Horrible EVO 4G Battery Life no matter WHAT I do!

I've about had it with my EVO 4G. I can barely use the thing before the battery is down to 30% or lower. When I first unplug it in the morning, I'll browse reddit or XDA for all of 5-10 minutes and my battery will go down to 75% easily. I've tried tons of ROMs (running Energy w/Shooter Anthrax kernel as I heard it got amazing battery life) I've tried resetting the battery stats -- i've tried unplugging and replugging in the phone multiple times when the charge light is green, I've tried just about everything I can find on here dealing with battery issues and to no avail! Listed in my battery stats the only thing that's ever high is my Display usage but even factoring that in should I really only be getting an hour or two of mild internet usage before my battery is completely depleted? I can barely make it through a 6 hour work day (checking texts on breaks, light internet, maybe a 5 minute phone call) without having to recharge it in my car.
I'm open to ANY suggestions short of buying a new battery -- sadly it's not an option at the moment.

Do you keep 4G on? That drains a battery like nothing else if left on. Same with GPS, especially in Sense Roms for some reason.

Ridgeburner said:
I've about had it with my EVO 4G. I can barely use the thing before the battery is down to 30% or lower. When I first unplug it in the morning, I'll browse reddit or XDA for all of 5-10 minutes and my battery will go down to 75% easily. I've tried tons of ROMs (running Energy w/Shooter Anthrax kernel as I heard it got amazing battery life) I've tried resetting the battery stats -- i've tried unplugging and replugging in the phone multiple times when the charge light is green, I've tried just about everything I can find on here dealing with battery issues and to no avail! Listed in my battery stats the only thing that's ever high is my Display usage but even factoring that in should I really only be getting an hour or two of mild internet usage before my battery is completely depleted? I can barely make it through a 6 hour work day (checking texts on breaks, light internet, maybe a 5 minute phone call) without having to recharge it in my car.
I'm open to ANY suggestions short of buying a new battery -- sadly it's not an option at the moment.
Click to expand...
Click to collapse
i recommend using a aosp rom if battery life is a MUST. I would suggest you use Decks aosp rom with CoD tweaks Tiamat 3.7.7 and vipermod and underclock to 500 on smartass governor........all this is what you should do if you choose decks rom

Make sure your 4G is off, but Evo is known for its horrible battery but thats ridiculous. Try a new kernal to adjust to CPU settings. If that doesn't work, you might need a new battery. Evos are know for having their battery fried easily, mine fried and I had to get a new battery. :/

You should definitely make sure your 4g, Gps, Wifi, and blue tooth is off. If that does not work I would strongly suggest you downloading Cyanogenmod 7.1. When you aren't using the phone under clock it and do medium speed when you are using it. I last around 8-9 hours doing this. Hope it helps.

Okay I installed Decks Evo GB rom and the Tiamat 3.3.7 kernel. I followed the guides but couldn't seem to do the undervolting correctly with the apps i was provided...but i'll do some testing and report back!
Can someone point me in the direction of the right app for undervolting and whatnot?

Ridgeburner said:
Okay I installed Decks Evo GB rom and the Tiamat 3.3.7 kernel. I followed the guides but couldn't seem to do the undervolting correctly with the apps i was provided...but i'll do some testing and report back!
Can someone point me in the direction of the right app for undervolting and whatnot?
Click to expand...
Click to collapse
vipermod is used for undervolting http://vipermod.tiamat-dev.com/vipermod-voltage-control/

Also, it could just be that your battery is tired. Is it at all swollen, in the least bit or rock hard? It should feel firm, but give a little.
People tell me all the time, "my battery is not holding a charge", it's not designed to. But, how it releases the charhe, is another story. Obviously, it's also dependant on use. Remember, the phone is only rated at 5 hours talk time. I can't think of a time I've actually tried that, but when I have been caught on the phone for extended periods I've only gotten at most 2 hours of conversation out of a full battery.
Sent in L*W*H

I had an Evo, loved it,but the battery was trash,even when I bought my 3500 mah battery, the juice in it wouldn't last a whole day,sorry man,there's just no hope for that phone,without undervolting properly
Sent from my Desire HD using xda premium

my battery doesnt last too bad in my evo. granted not like the old days, but i do get about 12-15 hours on a 1700 mah battery and a powerskin charging case with a built in 1500 mah battery. This is in a poor service area.. constantly switching into and out of roaming. i keep 4g, wifi, mobile network all off and screen brightness at about 25%.. this is with moderate txt, some light game play, occasional turn on 3g to check email and browse web. im expecting better now thzt i am rooted with energy rom and anthrax kernel.