bought the device on early august and now (december (even before december)) the battery performance have dropped. used to only have charge it once a day, probably over 24 hours since i dont use my phone for gaming too much, and now i have to charge it atleast twice a day. and when i sleep the battery keep losing its battery even though i turn everything off. i remember it loses 20% of its power in a few hours of me left the phone,sleeping. i literally turn it all off and go to sleep.