If your Android phone was recently updated to Android 4.1 (aka Jelly Bean) and you have been seeing really bad battery life ever since, read on. It could be that Google+ sync has been enabled by the update and that’s using up a lot of power. Go to your phone’s Settings > Accounts > Google settings screen. For every Google account listed, deselect the Google+ option. This should bring back sane battery life to your phone.
See Demystifying Android power usage for more generic tips on saving battery life on Android devices.
See Demystifying Android power usage for more generic tips on saving battery life on Android devices.