I had a Sony Xperia M and I started to have issues with the battery I did look on here and saw someone I can't rember who but they said buy a new battery for the phone which I did. So I get the new battery in charged it up and surprise surprise it done the same old same old so on 1/12/15 I stuck it on charge and it gave up the ghost thanks to this I am now 80 pound short this month because I've had to buy a new phone.
One last thing I'm never buying a Sony Xperia phone again I'm going to stick to Samsung now