[Tiberius85]

Disabling your active data connection when not in use, most efficiently by making the long hold end key disable active data connections, will give you significantly more battery life. I was able to keep my phone going for 3-4 days on standby with the radios enabled to take phone calls, but not an active ready data connection. Results are amazing.. works best right after a soft reset, and make sure your email is set to manually check.