My Samsung S5830i Galaxy Ace has a battery drain of 50% per night without usage, WLAN off.
The device is rooted, and I've had an battery issue when using Link2sd with a ext2 partition (bcm.sdhc.3 kept the phone awake all time). I fixed it using ext3. This was six month ago, no problems after that.
Since last week, I got this huge battery drain. BetterBatteryStats tells me the phone is sleeping most of the time, no suspicious processes.
I tried with a battery from a friend, no result.
I factory-reset my phone, no result.
I used a ClockworkMod recovery from the time before link2sd, no result.
The battery is still draining like hell.
What else could I do instead of throwing the phone away? Please help!