Andy_Langton - 10:32 am on Mar 16, 2013 (gmt 0)
Advanced Task Killer
Task killers on Android are usually a bad idea, and make battery life worse. See [lifehacker.com...]
It also won't stop certain apps from potentially keeping the system awake (e.g. Google's location apps). The built in battery monitor just won't tell you that, and the task killer would just kill such apps and make them reload from scratch again.
The single biggest difference I managed to make to battery life was with apps that give you more detailed stats on what's actually using the batery.