Came across this great article that discusses tips and tricks to save battery power on your smartphone. It has general tips and then tips broken down by phone type / OS type. Some of the tips include turning off extra services when you aren’t using them (like GPS, Wi-Fi, 3G), tweaking your back-light to be slightly dimmer or turn off quicker, and some apps that will put your phone into a deeper “sleep” mode or turn off signal searching when you’re in an area with no signal.

Check it out - Saving your smartphone’s battery life (via lifehacker)