| | 07-02-11, 11:57 PM Thread Author #1
Got a battery drain and I've pulled out the big guns to fix it
I kind of detailed this in another post but here goes again.
I bought a used Pearl 8220 just five days ago. So far I have LOVED it except for the fact that the battery is struggling. I've gotten a day's worth of light use out of it, which I figure is respectable, but my real concern has been at night, when the phone is "off." By "off" I mean powered down by holding the End Call key. The battery drains anywhere from 20-50% overnight while the phone is "off."
Now, of course I've started with the basics. Make sure all apps are closed, check for buggy third-party apps, disable Wifi, etc etc. Nothing helped.
I wiped the phone and upgraded to OS 18.104.22.1685, which has been great, except it still hasn't fixed the battery drain issue.
So I started digging in deep. At this point, all third-party apps are gone, I've deleted all sorts of unneeded modules like Voice Dialing, T-Mobile's Favorite Five, Voice Notes Recorder, extra apps like Password Keeper, I removed all games except BrickBreaker (because I love it), disabled Memory Cleaning, GPS and Location Services, turned the backlight to 70 and time to 20 seconds and even gone as far as reformatting my SD card and deleting all the existing BBThumbs.dat files in case Media Manager was staying up at night trying to organize thumbnails and stuff.
I even went through my even log, trying to determine if something was happening while the phone was "off," but nothing was logged after "system power off" or whatever it says when that happens. Maybe it didn't correctly log because the battery died in the middle of the night...?
While doing all of this, I ordered a new battery. During the meeting before I bought the phone, the very nice lady who sold it to me was more than happy to let me use it to see how well it worked. But the battery was dead. I remember her saying "that's weird, it had a charge when I left. It's never just died like that before." She told me she had been on vacation for a week prior and the phone had been left in her desk at her house. I figured the old battery could have discharged to the point of damage, and that could be causing it to drain itself overnight.
My new battery arrived just today, so I haven't had the chance to see if the old one is the culprit yet.
My last theory is (and I'm hoping I have it nailed) that the typical Broken Bluetooth is causing my problems.
Before thirty minutes ago, I had not once enabled my Bluetooth. Ever. I just have no need for it. But, after reading about how 82xx BBs commonly have problems, I decided to try mine. Sure enough, I check the "Enable Bluetooth" check box, and it unchecks itself seconds later.
On a hunch, I immediately check the event log again. Hey, I've seen that cluster of Bluetooth-related events before. Several times, actually.
Nailed it. This morning, when my phone was charging on my desk, it seems the Bluetooth had tried to turn itself on and failed several times. And, if this is an abnormal occurrence, what's keeping it from happening when the phone is "off?"
Now. My challenge. I need to completely remove any and all Bluetooth capabilities from my device. I'm guessing, short of removing the hardware, I can delete certain modules. But I don't know which ones to delete, and I would rather like to not bork my phone and have to restore the OS again because that takes FOR-FREAKING-EVER.
So. If you could provide your knowledge for the benefit of me and other Pearl Flip users, that would be much appreciated.