Battery Control automatically disables and enables the wireless connections (mobile data, WiFi, Bluetooth) of the device in order to save battery. Additionally it can notify you if battery usage in stand-by is above average (e.g. if there is some background process active although the phone is in stand-by).
Battery Control keeps the wireless connections off as much as possible, but turns it on whenever they are needed (when the screen of the device is on, the device is charging, or on a regular basis). Furthermore Battery Control prevents turning off the mobile data connection if there is still network traffic active. It can also disable the mobile data connection when the remaining stand-by time is low.
Battery Control also works in conjunction with Roaming Control (which enables or disables the mobile data connection based on your current network).
Unlike other battery savers (e.g. JuiceDefender or Green Power), Battery Control is very easy to set up, and needs no further manual user intervention due to its very intelligent algorithms to turn on wireless connections as needed.
Battery Control helps you to conserve as much battery as possible by turning off the mobile data connection as often as possible, which usually is (besides the display) the most power consuming part of a mobile device. It also helps you to identify you battery draining background applications.
Differences between full version and trial version:
The trial version offers the full functionality, but expires after 14 days.
Version history and explanation of permissions on the app website.