I recently noticed my phone (Xperia Play 2.3.2, 'Gingerbreak') is losing it's battery charge fairly quickly. I full charge used to show about 140-150 hours standby, and would with average use last about three days before needing a charge. However for the couple of weeks or more it's been showing only ~28 hours of standby for a full charge, and today without even using the phone it has dropped to 5 hours remaining in less than 6 hours! Clearly something i've installed must be causing this but I have no idea what, i'd rather not go through uninstalling every app and update installed in the last two weeks - so is there something that will show me what's been using the battery? Checking "About Phone > Battery Use" shows only what I would normally expect, Cell standby (25%), Bluetooth (25%), Wifi (25%), Phone Idle (24%), Display (3%) and Android System (2%) - nothing that I would expect to see a sudden jump in battery usage from.