Database Develop

[Q] Low-Battery Boot-Loop

Hey,
I just installed CyanogenMod 7 on my milestone using openrecovery. Everything was working perfectly, but the battery was draining like there's no tomorrow.
Started at 50% when I first booted, I downloaded a couple of apps from the Market, and went down to 20% (in the space of about 10 minutes). So I plugged in the phone charger (USB into back of my computer), and then while configuring settings, battery went to 4% (it was checking in 1% increments, which I have since found out that drains the battery). The phone then died. So, the phone was using WAAAAAY more power than the USB port could supply. Anyway, thought I'd let it charge for a while, then go back into the settings, and remove the 1% increments, to try and get normal battery life.
The phone recharges, and automatically reboots. Its still on 4%, but I went in, turned off the 1% increments. Phone dies again.
Charges about 10 minutes, reboots itself again. During this period, I did some research, and found that the battery draining can be caused by excessive CPU usage, resulting in the screen staying on even when it's off (?).
But, alas, no luck. I don't have enough battery to flash the stock SBF.
All I really want is:
a) a way to just have the thing charge without turning itself on, and
b) a workaround to get at least half-decent battery on CM.
Thanks,
David.

[Disclaimer: not guaranteed to work, I don't take responsibility for anything you do your phone!]
Try deleting your /data/system/batterystats.bin before trying this procedure out. You can use an app like Root Explorer to do this. If you're unable to, proceed with bump charging.
Try bump charging:
1. Remove battery, put it back in after a good 2-3 minutes and connect phone to a wall charger. Make sure the phone is still switched off while it's charging.
2. After it finishes charging completely (green LED), let the charger be switched on and connected - remove the battery alone (without switching off charging).
3. After a few seconds, you will see a "?" on your screen, after which you insert the battery back in (while charger is still switched on).
4. Wait till charging completes again (green LED).
5. Plug out charger, wait for 2-3 minutes and plug charger back in and start charging again. It should now be fully charged.
6. Turn phone on while charging, after booting into CM, try OC'ing it to 800MHz interactive governor, apply settings on boot and restart your phone.
Hope this fixes your problem. Good luck!
Anyone can feel free to correct me if I'm wrong.

rampee said:
[Disclaimer: not guaranteed to work, I don't take responsibility for anything you do your phone!]
Try deleting your /data/system/batterystats.bin before trying this procedure out. You can use an app like Root Explorer to do this. If you're unable to, proceed with bump charging.
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I had the same problem some time ago and tried all this to no avail. I even changed to froyomod for some time, but CM7 is far superior so I just came back to it. The problem happened again this morning just after using google maps. I then rebooted and uninstalled all google maps updates. Seems to be working o far.

hey, yeah, just one problem with that - i can't boot into android for longer than about 3 seconds, and now there is no way to revert, as the bootloader says Battery Low.

Can't you boot into recovery, flash another rom and then reboot into android?

Don't charge from usb, use wall charger. That way, the system will boot only to charge-only screen, android system itself not running.

Hey, kabaldan, I found that out.
Charged 100% using the bump method instructed above. Battery life is still worse than useless, 50% in about a half hour.
will performing those other steps help?

Can you try another fully charged Milestone/Droid battery?
If that doesn't work it might be a problem with your phone's hardware. I know it might be a long shot, try cleaning your phone's and your battery's leads (connectors) if they might've accumulated rust/dust or something. Not sure.

Don't know if this is a similar problem but mine goes down in % pretty fast too but then it can stay for 1% for half a day

No, mine definitely dies. At around 5%, although I did turn off the 1% increments, because I heard they guzzled battery.
The battery life is getting progressively better, but as soon as I use 3G, or open any half-decent games, it drops to about 40% in ~.00001 seconds.
Although, to be fair, I didn't get great battery life on stock rom, either. And my ram always seem chokkas. Like usually only have about 50mb, and I'm not running anything too hectic.
Unfortunately, I think I'll get the Samsung Epic as soon as they bring out the GSM version. I just want an android phone with an unlocked bootloader, insanely large screen, and hardware keyboard, not to mention ~20 days battery life. Is that too much to ask?

[Q] Battery faulty?

Hi,
My battery life/indicator has been behaving very strangely since yesterday, so I'm wondering if the battery is dying. I know about battery calibration, and attempting it hasn't solved anything. I haven't flashed any firmware recently.
When I plug in the charger while on, it almost immediately tells me it's 100% charged, but the number displayed will still be something low, like 50ish. When I unplug it, the number stays. It drops extremely quickly, to around 1-2%, then 0% and turns itself off. After turning it on again, it may rise to 10%, but drop again to 0% shortly thereafter. After a couple of times of turning it back on, it will refuse to turn on. Charging only seems to work when phone is off, but even then the charge won't last much more than a couple of hours of idling - no calls, no web, nothing.
I've tried charging to full while phone is off (drained), and removing battery stats via cwm before booting up. Doesn't help.
Is my battery faulty? It's a very sudden problem, and my battery has been lasting me for days before this happened

So, I got a new battery. The problem persists. I've tried a factory reset/wiping battery stats, but it's still that way. Could this be a hardware problem somehow?
Any advice is greatly appreciated!!

Which fimware are you on? In your case I'd go back to a stock firmware from samfirmware.com and test once again. If the problem persits, you likely have a hardware issue and I'd have it swapped for a new phone whilst within warranty.
BTW: http://forum.xda-developers.com/showthread.php?p=21612299

I'm using tweaky rom, JVS. I'm not too sure what the local firmware is (Singapore), the one I had before I switched to custom was 2.1, and I don't feel too safe flashing bootloaders when the phone is prone to turning off...

nwsk said:
[…] I don't feel too safe flashing bootloaders when the phone is prone to turning off...
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yeah, you are absolutely right. Have you tried betterbatterystats? ( http://forum.xda-developers.com/showthread.php?t=1179809 ) It will show you wakelocks when your phone should be idling.

Did it help ?
Mate, out of curiosity I was wondering if your issue got resolved.
Also, you should check what is draining off your battery.
I tried reading elsewhere and found "Battery Monitor Widget" could be useful for you to identify this.

Nope, still same problem. It's not a wakelock issue, because the battery dies /so/ fast. I can literally charge it to 100%, unplug the charger, and in 30 seconds it says 0% and turns itself off. The phone itself isn't running hot or anything, and seems to be just idling. [Edit: To clarify, it also charges to 100% in about 10 minutes or so. I'm guessing that for some reason the phone thinks the battery is 'full' and stops charging, leading to the quick drop. I've no idea what could cause this though]
I'm hoping that maybe it's a software issue now since the new battery isn't working either (the battery is probably a fake since i got it for cheap, but even then it should last at least a few hours before draining), and that the phone is confused with battery voltage levels or something when I put the new one in.
Anyway, I flashed JVU stock, didn't even root, and will be charging the new battery overnight while phone is off. It says 100%, but gonna leave it on charger anyway. Hopefully if I wake up tomorrow it'll be working :/
If that doesn't work, will be flashing DXJV9 (My original firmware was dxj4), and hope that it's the official one here. Then bring it to a service center and act dumb and hope they can fix it i guess...

Service center replaced motherboard. There goes a hundred bucks :/

Xperia Z battery problem

Hi guys my Xperia Z1 was charged to 100% after some use normally went down to 93% next second i pulled the phone out of the pocket it was turned off tried to turn it on got it to vibrate once but nothing showed up on display tried once again few minutzes later it booted up but just went off on bootloader. I came hame and put it on charger phone turned on showing like 50% battery drained it to zero started charging to 100 on 60-70% on charging suddenly went up to 100%
i used phone for 2 days with random reboots and after switching it on showing different percent of battery remaining, today it wont work without charger after i disconect charger phone shuts down. Could anyone tell me if this is problem with battery or its faulty motherboard maybe? thanks
ps. i need fast answer because im about to buy a battery

Tried to boot phone into safe mode and see how it reacts? Also do you use Stamina mode or any other service that changes or reads system properties?

whats the point of booting in safe mode if battery percent is going crazy even when phone is charging wile its shutdown

admir101 said:
whats the point of booting in safe mode if battery percent is going crazy even when phone is charging wile its shutdown
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You have classic symptoms of a dying battery. Replace it and the problems will go away... If you did a search, you would find exactly the same symptoms described by others and the same solution. Your battery can't hold power due to a deterioration of cells.

optimumpro said:
You have classic symptoms of a dying battery. Replace it and the problems will go away... If you did a search, you would find exactly the same symptoms described by others and the same solution. Your battery can't hold power due to a deterioration of cells.
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+1

recalibrate battery

how to properly recalibrate OnePlus 3t battery to avoid phone switching off at 20-30℅?

sharath_babu said:
how to properly recalibrate OnePlus 3t battery to avoid phone switching off at 20-30℅?
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Your phone starts to shut off at 20-30%?

yep

sounds like a defective battery.

I've gone from 100-0 a few times and it's never shut down before 0.

Try this after wiping cache only in recovery mode:
After phone turns off, try to turn it on and see if red writing appears, telling you that your phone doesn't have enough battery. After that, charge your phone up to 100% and leave it at that level still connected to the charger, for 10 minutes. Then use up the battery normally. Repeat until phone shuts off at 0%.

This might be a little late for your question, but I just want to share my experience here.
Recently, my phone kept turning itself off at a little below 30%. If I tried to turn it on immediately, it showed the red low battery alert. If I charged it for a few minutes and turned it on, the battery would show 30%+. That proved it had not suddenly dropped to zero and turned itself off, as I understood a defective battery would.
I checked the Net, and it seemed that lots of people have the same problem as mine. On top of the recommendations were to replace the battery and a factory reset.
With the info I gathered, I decided to try battery calibration, and installed this app (https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=en).
I restarted the phone three times before running the app (idea from an OP discussion). As instructed by the developer, I let the phone continue charging even when capacity reached 100% (orange container on top). In my first try, I only waited for the orange container below to fill to the max, then started calibration (even when the pop-up message was telling me it's still early). That was a mistake. After that, the phone started dying at a little below 40%. In my next try, I let the charging continue even when the orange container at the bottom showed full, until the app notified me it was ready for calibration. I calibrated, and my phone's battery is fine again.

Weird Battery issues

So my turbo just turned 2. For the past 6 months or so been having some weird issue. I was on RR Remix for a while, then went to CM14 by BBH27 for a while, and then back to RR, and now on ComputerFreak Stock. I don't have any issue with charging the phone. Quick charge works just fine.
I have had issues where the battery will just be dead even if it was at like 50% and confirmed charging.
I thought maybe it was my stupid charger (I have another that I have yet to test) but then last night, after charging my phone before I went to bed i unplugged it. I woke up around 6:45 to find my phone once again dead. It looks like around 2 am the battery just fell. Dead. Just gone. I go and hit the power button and i got 1%. The battery graph looks as if i turned the phone off. For the most part my battery last all day 12+ hours with some good usage too.
I'm getting ready to flash back to stock now that full stock MM is out now to flash and see if that makes any difference.

For what it's worth, my Turbo would just straight up shutdown when I was on RR. And not go through the shutdown process, just crash to a powered off state. It would happen if the battery was full, low, or anywhere in between. I don't know if that's the issue you were experiencing, but I suppose it's possible.

My daughters is having the same issue.
Anyone have a solution?
I've tried clearing caches, battery recalibration, etc.
Going to see about doing a fully clean install tomorrow if she is okay with it.

When this happens and the phone just shuts down, does the battery percentage immediately jump back up when you plug in a charging cable? I was having that problem when using wireless charging a lot. It turned out be a battery calibration issue. You can re-calibrate by holding the power button and KEEP holding it when the "Power Off" dialog pops up. The phone will eventually reboot itself then leave it overnight on the factory turbo-charger.
One warning - Since the marshmallow update, performing this procedure seems to wipeout your BT connections.