Database Users

[Q] Display killing battery life

Hey all,
Quick question - for some reason I have really dodgy battery life in any of the most recent Android builds. This includes the Sense HD and the SuperRAM builds, with both recent MDJ & Hastarain Kernels.
If I leave the device in my pocket for a couple of hours, in standby, the "Battery Use" claims the Display is the primary cause for my battery use.
Just looking at it now, Android System and Android OS are both on 12% and the display is at 57%. That's after the display being mostly off......
I've tried three ROMS, including VBN's Android build, an official 1.66 HTC build and an official 3.14 HTC build. Furthermore, I've tried the 2.15.50.14 and 2.10.50.28_2 Radio's, both recommended for good battery life.
Any ideas?
Thanks
Jon

I am wondering the same thing. I am running darkstone hd2 froyo v3 with hastarins 8.5.1 oldcam kernel, everything runs great but it says display is killing my battery. If there is anything I can do about this I would really like to know.
Sent from my HTC Desire using XDA App

technoob said:
I am wondering the same thing. I am running darkstone hd2 froyo v3 with hastarins 8.5.1 oldcam kernel, everything runs great but it says display is killing my battery. If there is anything I can do about this I would really like to know.
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
Phew, it's not just me then! If I could be bothered I'd dig up an old sense build with and old kernel and see what happened. However I can't remember which one worked best as I change my ROM on what feels like a daily basis!

I have been using this as my daily build but I really wish there was something I could do about the battery drain. If it is something about the phone that I can't change or if a different kernel or something would help, I wish I knew. Any help would be appreciated.
Sent from my HTC Desire using XDA App

jonboyuk said:
Phew, it's not just me then! If I could be bothered I'd dig up an old sense build with and old kernel and see what happened. However I can't remember which one worked best as I change my ROM on what feels like a daily basis!
Click to expand...
Click to collapse
it's not just you indeed, it's everyone there's at least two threads already about this.

Well, I dont really think its killing my battery life, however i did notice that its lower than when running winmo, I checked the settings and it says display is using 60% of power, I didnt really think anything of it as i guessed the display is easily the thing that requires the most power. So perhaps I have this problem too? I dont really know
Winmo I would get a day, perhaps a day and a half if i was lucky, android i get a day.

Samdeath said:
Well, I dont really think its killing my battery life, however i did notice that its lower than when running winmo, I checked the settings and it says display is using 60% of power, I didnt really think anything of it as i guessed the display is easily the thing that requires the most power. So perhaps I have this problem too? I dont really know
Winmo I would get a day, perhaps a day and a half if i was lucky, android i get a day.
Click to expand...
Click to collapse
That's the thing you see, if the display is off for 2 hours, on for say 3-4 mins while I check my e-mail, it's still at a really high figure. Yes the display causes battery drain, but no where near that much.
I wonder if it's purely a kernel thing??

I only get 5% on my display battery drain.
Sent from my HD2 Droid using XDA App

jose makalolot said:
I only get 5% on my display battery drain.
Sent from my HD2 Droid using XDA App
Click to expand...
Click to collapse
are u using anything special for battery?

dapoharoun said:
are u using anything special for battery?
Click to expand...
Click to collapse
Nope...
Sent from my HD2 Droid using XDA App

I've noticed it depends what Android rom your using. The issue for me is either the Android System OS is using 60% & over or the display is using 60% and over. Either way the display or the system is the battery eater in my case lol.

DramatikBeats said:
I've noticed it depends what Android rom your using. The issue for me is either the Android System OS is using 60% & over or the display is using 60% and over. Either way the display or the system is the battery eater in my case lol.
Click to expand...
Click to collapse
What eating mine is cell standby and wifi, both 35-40% while android system is only 20% and display is 5%.
Sent from my HD2 Droid using XDA App

My display always takes up more than 60% of the power usage, but I have had builds where it's reported very low, I don't pay much attention to that anymore, they're probably not that accurate.
I did ran a quick test the other day of battery usage in winmo vs android. In standby both android and winmo were about 3-6ma. On the dimmest setting with no app running, winmo used 78ma, and android used 95ma, so it's a little higher, but not extreme.

I'm running at a crazy 67%...
For the heck of it, turned off all radio, left thephone @ 70%. Came back 1 hour later, tells me this percentage and the phone is at 63%...

Weather it's the Cell Standby, Display, Wifi or the Android OS, something is always taking power. If your phone drains completely in an hour or a day, the battery usage is just telling you what is drawing the most power percentage wise. 3mA or 300mA, it accounts for 100% of what's being used,screen off or not.

My android os only uses like 5% maximum, display is usually 60 though
Sent from my HTC HD2 using XDA App

Guys, you need to correctly interpret the percentage values...

greg17477 said:
Guys, you need to correctly interpret the percentage values...
Click to expand...
Click to collapse
What do you mean?

[Q] How to calibrate battery empty point?

I've already wiped battery stats, I think I'm getting full charge, and I'm getting pretty good battery life (over 24 hours last run).
The problem is that Android can't seem to tell the appropriate 0% battery point. Several times I've had the phone shut down when the battery life is at approximately 20%. When I try to reboot, there is not enough juice left to make it even to the multi-boot loader.
Is there a way to recalibrate the dead battery point so Android reads correctly?
BTW, I'm running Darkstone SuperRAM Froyo 1.5. (SD/RAM build)

lukedunk said:
I've already wiped battery stats, I think I'm getting full charge, and I'm getting pretty good battery life (over 24 hours last run).
The problem is that Android can't seem to tell the appropriate 0% battery point. Several times I've had the phone shut down when the battery life is at approximately 20%. When I try to reboot, there is not enough juice left to make it even to the multi-boot loader.
Is there a way to recalibrate the dead battery point so Android reads correctly?
BTW, I'm running Darkstone SuperRAM Froyo 1.5. (SD/RAM build)
Click to expand...
Click to collapse
have you tried turning off the phone and let it charge to 100%(when you dee the green notifiationled) and then turning it on. and then wipe the battstat.
just an idea, always used this method if the phone cant charge past 99%, maybe it wil work to on the dead point.

vensterbank said:
have you tried turning off the phone and let it charge to 100%(when you dee the green notifiationled) and then turning it on. and then wipe the battstat.
just an idea, always used this method if the phone cant charge past 99%, maybe it wil work to on the dead point.
Click to expand...
Click to collapse
Yes, that's how I wiped the batt stats the first time, which greatly improved battery life. But now there is the power off at 20% thing. Strange.

lukedunk said:
Yes, that's how I wiped the batt stats the first time, which greatly improved battery life. But now there is the power off at 20% thing. Strange.
Click to expand...
Click to collapse
Then its the roms fault some things are just the way they are. Mine goes to 15% and shuts down. The build I'm now using goes to 8-7% with 100% charge. What Rom u using?
Sent from my HTC HD2 using XDA App

Oeps, you're running syperram I see I had that same problem with superram. I just live with it try nand roms!
Sent from my HTC HD2 using XDA App

i think it's the build's fault. me and a fellow xda user also experienced the same thing with superram.

Thanks for your help! Guess I can stop searching in vain for a fix. I love the build otherwise - the only one that hasn't given me sleep of death with TMOUS.
Unfortunately I can't go NAND yet due to a crappy WM application I need to use for work, which isn't available in android.

See if "Tasker" app can do an auto shutdown at 20% and keep a spare battery in the pocket if you like SuperRam. I like SuperRam and it's my build of choice. Not a fix, but a spare battery in the pocket is good anyways.

[Q] Reverting to Windows Mobile 6.5

I flashed Android to my HD2 using NAND and now I want to go back to WinMo 6.5. Can anyone tell me how to do this.

Get the WM ROM you want to install and enter the bootloader - turn off the phone and then hold down the volume down button and briefly press the power button. Keep holding the volume down button till you get the tri-colour screen. Connect to PC via USB and run the WM ROM installer.

Download the original ROM or custom ROM.
Put your HD2 in Tricolor Bootloader mode by holding the VOL-down button when powering on.
Flash your ROM.

Where can I get the WM ROM?

oscar0324 said:
Where can I get the WM ROM?
Click to expand...
Click to collapse
Either from HTC websites in your country or xda : http://forum.xda-developers.com/showthread.php?t=577717

oscar0324 said:
I flashed Android to my HD2 using NAND and now I want to go back to WinMo 6.5. Can anyone tell me how to do this.
Click to expand...
Click to collapse
Why would you want to do that? Andriod is awesome and better suited to the HD2 than the WM it came with...
But each to their own.. Try the following link...
http://www.4shared.com/dir/22189940/b8552fa0/Shipped_Leo_ROMs.html

I'm with Oscar, i am going back too. I have downloaded setCPU and tried all the other suggestions but I am still burning through my battery at a ridiculous rate. I like the Android OS but I need a phone that will stay charged for longer than 12 to 14 hours while in standby!

Android kills the battery. Less than 4 hours a day, that sucks!!!!
Sent from my HTC HD2 using XDA App

I've not had the battery issues you've mentioned. You don't happen to be leaving bluetooth running do you? This has a known issue with battery drain.
I don't use bluetooth and I get extremely nice battery life with the gingerbread android builds.

Rtwalker said:
Android kills the battery. Less than 4 hours a day, that sucks!!!!
Sent from my HTC HD2 using XDA App
Click to expand...
Click to collapse
I get 48 hours without any tweaks at all on almost every Android I'v installed. Currently I'm using CoreDroid and my standby battery drain is average 2-4 ma with Current Widget. You guys are CRAZY for going back to winmo but I guess some people just can't stand a way better OS

Scolo said:
I'm with Oscar, i am going back too. I have downloaded setCPU and tried all the other suggestions but I am still burning through my battery at a ridiculous rate. I like the Android OS but I need a phone that will stay charged for longer than 12 to 14 hours while in standby!
Click to expand...
Click to collapse
Rtwalker said:
Android kills the battery. Less than 4 hours a day, that sucks!!!!
Sent from my HTC HD2 using XDA App
Click to expand...
Click to collapse
Its because you are either using an old/crap rom or you havent done enough research.
I have tried MANY roms and most of them now have excellent battery consumption. Between 1-5mA on standby.
Make sure you try things like remembering to turn off bluetooth/wifi when not using them aswell as have a upto date kernel/rom, also make sure that your radio is a uptodate version.
There is loads you can do, you simply cant be bothered, that is your problem. Battery consumption used to be a big problem, that simply is not true anymore.

wrecless said:
I get 48 hours without any tweaks at all on almost every Android I'v installed. Currently I'm using CoreDroid and my standby battery drain is average 2-4 ma with Current Widget. You guys are CRAZY for going back to winmo but I guess some people just can't stand a way better OS
Click to expand...
Click to collapse
48 hours? The only way I can't get this is by using it...err...I mean NOT using my phone at all. Just letting it sit there (maybe a dozen of calls).
Sent from my HTC HD2 using XDA App

It would not make it back

battery drains completely in less than 12 hours

On Galaxy S I9000.....what can I do to fix it? This happens even with minimal usage.

Which rom?

malcho said:
Which rom?
Click to expand...
Click to collapse
2.3.4 Gingerbread xxjvp

try to overcharge your phone and see if there still any battery drainage!

I have same "problem". It will be fixed when there's been few batterycycles.
Sent from my GT-I9000 using XDA Premium App

I've only had this rom for 1 day.
Sry for doublepost.
Sent from my GT-I9000 using XDA Premium App

I have this issue on Darky 10.1 (2.6 kernel), 2.3.3
Battery lasts around 10 hours with light to medium usage (its a new original Samsung battery as well).
Does anyone have any quick advice to fix this? Bit under time pressure due to job at the moment and don't have much time to research this. Any advice to fix this easily and quickly?

I had this problem after switching on the “Vorabruf über Mobilnetz“ in the Cache-Settings of Google Maps. Maps was closed, but battery was fast going down. Using XWJVH.
Sent from my GT-I9000 using XDA App

I too have almost the same problem with Darky Rom 10.1 - but I've heard that it has been fixed in the new beta version. I'm gonna flash it at the end of the week and after a few days of observing, I'm gonna tell you the results.

Jobiza said:
I have same "problem". It will be fixed when there's been few batterycycles.
Sent from my GT-I9000 using XDA Premium App
Click to expand...
Click to collapse
It's been through quite a few cycles.

I think I figured it out.....I think it was Skype. If you sign in the app is always on...it doesn't have an exit feature. There is, however, an app to close it. I used it and got normal battery life today!
We'll see if it keeps working like it should.

So I've upgraded to 2.3.4, (Ficeto.Deodexed.XXJVP) and Android OS battery drain stopped. Now it shows 70% battery usage on display (before it was 70% android OS). I recommend updating your system too

with darky on medium use never had more than 14 hrs )

I've given up for the moment and gone back to Darkys 9.5
Now at least I can get through one whole day and have about 40% left

Diaf82 said:
2.3.4 Gingerbread xxjvp
Click to expand...
Click to collapse
Are you willing to flash the rom again? or you can try to use the speedmod 15g t11 for the kernel to replace the JVP kernel.

it's said that when you use the USB connection to your PC, you need to reboot it. So this battery drainage will not happen.
In the ROm 2.3.3 JV5 and JV6 for Asia, I do the same to keep the batter alive.

Try backing up everything and then factory reset phone. Generally this happens because of a few unwanted applications excessively using ur processor, in turn draining battery or there may be a malware that stealthily connects itself to the net. This will almost certainly cure the disease. If it doesn't, then there is a serious defect in ur hardware or some of ur system app required for properfunctioning of the phone is corrupted, causing excess pressure on the processor

It is a big problem to everyone, I charge twice per day for this.

Calibrate your battery
Let the battery go down to 0% and turn off
Then turn the phone on, it'll turn itself off again cause battery is low
Keep doing this until its totally 0%
Plug in the charger, charge it to 100%
Turn the phone on
Download SGS Tools from the android market place
Run the app
Go to "scripts"
click delete battery stats
Unplug charger & you're done
battery should be more stable now
go to settings
applications
running services
check what you have in the background
close them down if they're unecessary
I get through the workday with only 10% loss

If you have an really old SIM card, try and replace it with a brand new one. This may also help. I had bad battery run time with two LG Optimus 2x phones (about 10 hours) and not so stellar 20 hours with the i9000. Finally I stumbled over some advise to replace old SIM cards. Since mine was over 12 years old, I ordered a new one. It is not gonna change the world, I know, but it was worth a try .

Battery problem (a new kind)

Dear friends,
I've a difference kind of problem (as I've searched the forum). My wildfire runs on stock rom (2.2). Not updated.
The problem is, even after fully charged, the phone works for merely 30 minutes.
After fully charged the battery shows 100% within 30 munites it comes to 10% and red colour then goes off. If switched on again the battery shows 100% and then the same process. I tried battery calibration too. Nothing helping.
Any of you can help me in solving this?
Thanking you in advance.

Battery weared as far as I know.
Faced this issue with other phones. Definitely it is a battery problem. If u speak on a call with this battery, the phone gets switched off instantly. And when using phone plugged into wall charger, it works fine.
Try to confirm it by checking with friends batteries if u find any.
Sent from my HTC Wildfire using XDA App

You mean I need a new battery?

sameeha said:
You mean I need a new battery?
Click to expand...
Click to collapse
Exactly.
But pls confirm it before purchasing a new battery. I maybe wrong too.
EDIT : if there are any applications that show the percentage of battery wear, they might help u . Try for those too.
Sent from my HTC Wildfire using XDA App

Thanks a lot for your info. I will.

If you have clockwork recovery, try wiping the battery data. ( it could be called battery stats. I cant remember the exact name). See if that helps.
But as others suggested, it maybe a battery problem. Just worth a shot.
Sent from my HTC Wildfire using XDA App

OK. I will try and thanks

Also, when wiping bat stats, chrge the phone for about 4 hours so that it's 100%

OK, thanks.