So far I'm impressed with my battery. Before when leaving it on 4g all day, the battery would last 8-9 hours. After the update I didn't really notice a difference until about the third cycle and the last two days on 4g have been great. Today I have been on battery for 9:40 mintues and still have 48% left on standard battery. I'm finding data switching is faster, as is the camera. Find I don't use Camera Zoom Fx anymore.