Develop Bugs

[Q] Strange battery problem

Hi all,
My battery drains really fast, faster than normal if I see the replies to the calibration thread. After less than half a day (as in 6hours) with wifi turned on and "playing" a bit with it (exploring apps, check them out etc.), say about 2hours of intensive use, my battery is at 25%. It never lasted longer than 24h, that's with wifi off most of the time. Running CoPilot it lasts only 2-3hours. I tried the calibration for nexus one posted in android dev forum several times, including battery stats wipe. It's at 29% but overcharged says 3762mV, also if fully charged it never goes above a certain V which I don't remember right now but I'll post back when it's fully charged The V it stays at is a lot lower than the replies on the calibration thread said it should be, that's why I'm think my battery doesn't charge fully.
I'm running LeeDroiD with no setCPU.
Is this behavior normal? Do these mV's correspond with the batt %? (29% <> 3762mV)
Thanks!

I'm using Leedroid as well, but I don't see excessive battery usage.. Most of the time I can survive for > 12 hrs..
from my Desire + XDA App

I have the same problems as you with a short battery life, I upgraded the battery to one with a larger capacity but that makes no difference, I have been told that this is a common problem and a fix will be out in the near future from HTC.
I also use Co-Pilot and when I ran it the battery could not keep up, I bought a car charger from e-bay and it may be a fake and I now have the new charger with the USB plug and that works ok, if you have a car USB charger try using it with the original sync cable, if the battery stays full then the old charger is at fault. My understanding is that there are a lot of fake chargers and accessories out there and they look the part but do not supply enough power to run with the phone running Co-Pilot.
Hope this helps.

iveco420 said:
I have the same problems as you with a short battery life, I upgraded the battery to one with a larger capacity but that makes no difference, I have been told that this is a common problem and a fix will be out in the near future from HTC.
I also use Co-Pilot and when I ran it the battery could not keep up, I bought a car charger from e-bay and it may be a fake and I now have the new charger with the USB plug and that works ok, if you have a car USB charger try using it with the original sync cable, if the battery stays full then the old charger is at fault. My understanding is that there are a lot of fake chargers and accessories out there and they look the part but do not supply enough power to run with the phone running Co-Pilot.
Hope this helps.
Click to expand...
Click to collapse
Thanks for your reply. I meamt that woth copilot running on pure battery, with the charger connected no problems.. good to know that i'm not the only one woth this prob.

iveco420 said:
I have the same problems as you with a short battery life, I upgraded the battery to one with a larger capacity but that makes no difference, I have been told that this is a common problem and a fix will be out in the near future from HTC.
Click to expand...
Click to collapse
A lot of the extended batteries on the market are well below their advertised capacities (see here). I've not heard of any official "fixes" for battery life, but then again I get 30+ hours from a charge,
Regards,
Dave

Yeah I'm not gonna buy a non-genuine battery; simply don't trust them.

I have spoken to HTC about the battery problem a few times and according to the guy I spoke too there is a patch that will be released soon, I dont know the exact details but it is supposed to help the battery life, my phone would be dead if I ran Co-Pilot for an hour.
I am now using a 1600mAH instead of the standerd 1400mAH, the battery is the same size as the original and was supplied from a trusted manufacturer. I have also killed my task killer and will wait and see what happens, some people say that its not neded or HTC would have built one into the software, so I will give it a go for a week or so and see what how it works out.

Well hope this "patch" helps and it'll be integrated in the custom roms. However, a task killer isn't necessary because of the way android is designed. Apps get hibernated as soon as they don't require any interaction/resources anymore (eg. Load a webpage and immediatly go to home; Internet will load its webpage and as soon as it's loaded the Internet app goes into hibernation so effectively its killed just takes some ram (i think), at least it doesn't use any resources at this point anymore).
Services, however, run continuously and do indeed take battery the whole time.

Battery Life

My battery has been depleting at a very rapid rate and am wondering if it's normal or something I can do on my end to fix. For example, I made a phone call and left a voicemail and the battery went down about 3%. I was thinking of just buying a replacement battery, but if there is something I can do to try and fix the current one, I'm open to that.
Thanks!

pchieng said:
My battery has been depleting at a very rapid rate and am wondering if it's normal or something I can do on my end to fix. For example, I made a phone call and left a voicemail and the battery went down about 3%. I was thinking of just buying a replacement battery, but if there is something I can do to try and fix the current one, I'm open to that.
Thanks!
Click to expand...
Click to collapse
Depending on your reception (and length of call/voicemail), that could be quite normal. There are other factors as well; is this a new phone? Have you recently flashed a new ROM, restored a backup or done a factory reset?
Sent from my HTC Vision using XDA App

OriginalGabriel said:
Depending on your reception (and length of call/voicemail), that could be quite normal. There are other factors as well; is this a new phone? Have you recently flashed a new ROM, restored a backup or done a factory reset?
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
I just checked my phone since I posted the initial thread and it went down another 8%?! It definitely didn't used to be like this. The phone isn't new, it's about 14 months old. And yes I did recently root my phone and flash CM7 on it, but I thought it would have improved the battery life, not make it worse!
Let me know if any other info is needed, thanks!

Using the phone in the same location (like work or home) as you previously used the phone? Reception is often tied to location. I get rapid battery drain when in poor reception areas.
How long ago did you flash the ROM? You should cycle the battery from full charged (100%) to about 20% (but not empty) and repeat this a couple times in order to properly calibrate the battery meter. This needs to be done every time you flash a new ROM, in order for battery readings to be accurate. You can also clear the battery stats before you do this, to make sure any previous data is not screwing up the calibration.

pchieng said:
I just checked my phone since I posted the initial thread and it went down another 8%?! It definitely didn't used to be like this. The phone isn't new, it's about 14 months old. And yes I did recently root my phone and flash CM7 on it, but I thought it would have improved the battery life, not make it worse!
Let me know if any other info is needed, thanks!
Click to expand...
Click to collapse
As redpoint stated, you need to cycle a few times after flashing a new ROM.
Let's say your battery was at 60% when you flashed CM, the ROM is basically going to think that 60% is as full as it gets; after a few cycles, the ROM will "learn" your battery.
Additionally, there are so many tweaks one can do with CM that you can actually kill you battery faster if you max everything out (overclock all the way, turn on all the eyecandy, etc.)
Sent from my HTC Vision using XDA App

Check your parameters, set OC profiles in order to optimize energy consumption, also as said upper calibrate battery meter and then see how your battery holds, i don't think it's a physical defection because hardware is well made but you never know so do this and then we'll see.

download battery monitor widget from market and track the history and usage statistics, that will give you a starting point to trace the issue. as a reference, my DZ running miui and cm7 kernel is using roughly 26-29 mah with screen off
Sent from my HTC Desire Z using xda premium

I'd suggest flashing a new kernel for better battery life if all else fails.
Currently I'm running EliteMod's kernel, U flash it just like you would a rom
http://forum.xda-developers.com/showthread.php?t=1246682

I've been getting some bad battery life but not nearly as bad as you have.
I suggest fiddling with SetCPU or turning off all your usual wireless services like Wi-Fi, 3G and GPS

I bet the problem is that you got sync on! That NAILS AND KILLS BATTERY FAST!
Here you new gameplan.
Step 1: Download battery dr.
Step 2: Shut off all sync (manually sync when you need email updates etc.)
Step 3: buy 2 backup batteries from Ebay for cheap
Step 4: Shut off volume vibrate on keypress, shut off all animations, shut off volume noise on keypress, turn screen of from inactivity to 15 seconds.
That should help. Let me know your results.

Desire with BCM RC4.1 Update 2, poor battery life (even with wiped battery stats)

Hi,
At the weekend I flashed the BCM ROM RC4.1 Update 2 and 4EXT recovery touch 1.0.0.5 RC5
(Can't post in that thread, I need at least 10 posts first)
I've performed the usual calibration steps (think this is right):
1) Charge to 100%
2) Power off and charge till green
3) Boot to recovery and wipe battery stats
I've just made about 5 mins of phone calls in full signal strength and lost nearly 20% of my battery.
The battery is a week old, I was getting about 18hours with my regular usage on CM7.
I tried turning off all the radios, no significant difference.
Running Watchdog, no misbehaving processes with threshold at 40%.
Can anybody help?
Thanks,
Jim.

What kind of battery did you buy ? A original htc or a Chinese ebay imitation product.
And the steps you describe for calibration won't do a thing. You should search for the calibration thread on xda. Which is a more genuine method.
Sent from my HTC Desire using xda app-developers app

Here's the battery on ebay:
Put
Code:
/itm/130712313750
on the end of ebay.co.uk
Reviews put it as a decent cheap battery.
Works perfectly with CM7, about 18hours, same as my old battery when it was new.
It doesn't, however, appear to have an ammeter or voltmeter built into it, so there is no way to get an accurate capacity off of it.
Does Android use the amps and volts metrics provided by the battery to calculate the battery stats file I wonder?
I'll look for another calibration thread then.
Ta,
J.

So far every one of the myriad duplicate battery calibration threads I've read are basically:
1) Charge the battery
2) Delete the battery stats
So I guess there is something else wrong either with my installation or my battery.
If I restore the backup of my CM7 installation I can see whether anything horrible has happened to the battery.
I could also put my old (fairly knackered) HTC battery back in and see it that also drains in 4-8 hours with BCM.
And dear god do I hate the captchas on this site. I have to refresh the thing 10 times before I see one that is even reasonably readable!
J.

Hi,
I put my original HTC battery back in and ran it with BCM today.
I pulled battery monitor widget's battery history file from the SD card and compared two normal working 9-5 days, one from CM7 and one from BCM.
Assuming that the second to last column in the battery_history.txt file is phone load (does anybody have the exact file format?)
eg:
Code:
2012/06/01|13:51:06|-59mA|85%|4016mV|24.3ºC|.111|0
If I only include the records where that value is zero and average the draw on a weekday, 9-5 I get:
CM7: -34mA
BCM: -94mA
If I once again assume the second to last column is some sort of load indicator, average load is 0.34 and the average drains are:
CM7: -71mA
BCM: -118mA
If somebody could post what the last two fields in battery_history.txt are, that would be very useful.
But so far it appears that BCM is haemorrhaging electrons for some reason.
J.

[Q] Two batteries - configure capacity in android ?

I just got one of these extended 3600mAh batteries for my i927, and now i wonder if there is any way to tell the phone/android when/if i am swapping batteries and therefore changing capacity of the battery.
So far, the only thing i found was a way in CWM to reset the battery stats. I now try to train the phone to the new 3600mAh battery, but if i ever should even just temporarily swap it against the older 1800mAh battery, then the stats will get totally screwed up again, right ?
So, any app to maybe store and recall the battery stats ? Then it would be possible to train the phone independendly for each battery, store the stats, and accordingly use the app to recall the battery stats after swapping it.
Thanks

It's not the phone that gets trained, but an IC in the battery itself. Each battery has an embedded processor that tracks current charge levels using a semi-predictive algorithm. That's what the third conductor is for -- it's a one-wire serial connection between the phone and the IC inside the battery. So when you switch batteries, you're also switching the IC that's tracking the battery's charge.
The batterystats.bin on the phone is just statistics tracking for what is using power, how much, and how often. These are the stats you see in Settings -> Battery and have nothing to do with current charge levels, actual or displayed.
tl;dr: It doesn't work that way. Swap your batteries freely and don't worry about it.

Brightness taking the battery?
Is there an app or tweak that will let me turn down the "ambience" on my captivate? I mean, on my old iPod (I know, right ) there was a Cydia app that allowed me to set a certain time for when the brightness would kind of "lower the hue" and made it look kinda like a old style fleurescent light. Kind of amber in color.
In my battery manager, the screen takes up MORE than 50% of my battery life, and I was wondering if there was a way to do that, instead of having to manually turn up the brightness when I need to. It's currently all the way down, and yet STILL ueses a bunch of battery.
Anyone?

I use the Lux app from the app store and it does this. At a certain time it will transition to a warmer color that you set and it also has many settings for light dimming based on a number of factors. You can also set the output to sub zero.
Sent from my SGH-I927 using xda app-developers app

Battery level to high

Dear xda community,
my problem is that my battery level says my battery is charged to 4432 mAh (checked via couple of battery calibration apps), interesting thing is, that the max capacity of my original battery pack is only 3000 mAh
Things that may occured by this is, that my phone reboots frequently if i plug it off the charger. It does this in a way which makes it for me unusable, because it did not even load further than the lg logo in the bootloader, only way to fix it up again is to plug the charger back in. I tried flashing a new rom, an older rom (where these problems never came up) and also flashing the latest kernel.
I'm currently running on cm-13.0-20160309-NIGHTLY-d855.
Hope somebody can identify the problem and help me out
Best wishes,
LoCk :3

dude ur battery is gone.i had the same problem and the only fix is new battery.so go get a new one ok,it will solve ur problem i guaranty u that.