I have a galaxy ace 2 and am suddenly having episodes of battery drain. I woke to a dead phone yesterday and charged it at work. I needed to charge fully last evening, and it was down to 4% this morning. It first happened last week...I turned something off...not sure what.
Thought it was OK....
Help!
pasta have you got the smart network box ticked. This is a battery killer as your phone is constantly switching between wifi and mobile networks and between 2.4Ghz and 5Ghz bands. Have a look in settings, wifi and untick Smart network box.