Help battery issues- need help badly

[niro0070]

i have sgs 2 running stock rom and jelly bean os.
in the last month something has changed severly in terms of battery use and i'm talking about numbers that doesn't make sense.
battery going from 100% to 0% in less than 8 hours with little use, charging taking over 6 hours and even then doesn't get to 100%, battery losing power while the phone is plugged in.

now i tried everything: buying a new charger, buying a new battery,restoring to manfucaturer settings,formating, shutting down power draining apps, recalibrating the battery ( which made things worse), deleting nova launcher and going back to touchwiz....pretty much everything....

does anyone have the slightest idea of something that might help me?

 

[paulhen]

I have no idea but I have exactly the same problem on my Chinese pad and have tried a number of the same solutions. My pad is a similar platform to Samsung. I have sent a log file to to the battery monitoring software Battery HD from play store but they have not responded - it showed a 60% power drain over two minutes. Otherwise, my symptoms the same as yours,
.
But in addition, my keyboard starts to generate random characters she plugged in. Also, WiFi has to be turned off and back on for the tablet to scan for connections - I tried deleting some connections in memory but it did no good.