When purchasing a game, one major factor (along with price and replayability) is how much battery it uses. If I feel that it will quickly drain my battery, I don't buy/download it. I don't want to be charging my touch everyday. So I pose the question: how important is a game's or app's battery usage important to you? Also, what factors play in how much battery is used? I assume that accelerometer usage, WiFi usage and higher, 3D graphic drain it more. Any more factors?