Do you have an Android phone? If you go to the settings you can look up battery usage. As a general rule of thumb, battery usage is the top consumer of battery

Do you have an Android phone? If you go to the settings you can look up battery usage. As a general rule of thumb, battery usage is the top consumer of battery capacity. For example, on my GNex I've just checked the battery usage, screen is at 52% (and that's on a very low brightness setting, low enough that I don't bother using it outside).