About 2 months ago, my gf started experiencing an odd problem with charging her Samsung Galaxy S2. While it was connected on charger and on stand-by, it would charge only 5% in like 2-3 hours. Sometimes it wouldn't charge at all, but instead discharge while on charger! Since I restored the factory settings, and later flashed CM11, this problem has gone away. However, an absolute maximum of screen-on time doesn't get over 2 hours, ever.
- I have the Greenify app, and most of the apps are greenified, including keyboard even.
- I have data off at all times, and am using Tasker to turn it on only when certain apps are running. Turning the screen off or exiting the app disable data.
- Screen brightness is at 50%
- Maximum CPU frequency is lowered to 1000 MHz (it was 1.2GHz)
- CPU governor is ondemand
- I/O scheduler is CFQ
- The phone is running CM11 nightly from 16/02 with it's native kernel.
I have recently bought a battery which is claimed to be an original. I don't know if it is, is there a way to actually check it? The battery life has not improved in regard to the old battery, the one that came with the phone. I have also tried Gustavo kernel, but for some odd reason the drain was like 1% every 2 minutes when on standby, so I restored the latest backup.
Maybe worth to mention is that I have a yellow-ish rectangle going over my screen. It's not really noticeable, only in apps with white background. The rectangle is located in the middle of the screen, goes from side to side, and takes ~1/3 of the screen vertically. I have no idea what is that, but the screen is okay. It's responsive and the colors are fine.
I have no idea with else I could do to improve my battery life. It's seriously awful. I'm going to try and calibrate the battery tonight using some app I found on XDA, but I'm not too optimistic.
Any tips?
Battery history pics:
Can't post 3rd pic, but the total screen-on time is 1hr 30min.
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