Are you running a Sony Xperia handset that uses the NovaThor U8500 chipset? Are you frustrated by the battery life? Well then you may want to check out Xcore. The app works for the Sony Xperia P, Xperia U, Xperia go and Xperia sola by disabling a CPU core to enhance battery performance.
Users report that it works quite well and running on a single core is fine for most tasks barring gaming and video streaming. It features a simple UI on/off toggle to enable or disable the action. If you want to try the app yourself, click here. Note that your phone needs to be rooted for this to work.