Reduce Exposure to Harsh Temperatures
Lock the Screen When Your iPhone or iPod Is Not in Use
Turn Off Email Autocheck
Turn Off Wi-Fi
Turn Off Bluetooth
Turn On Auto-Brightness
Turn Off Equalizer
Turn On Airplane Mode (when possible)
Charge Everywhere
Cycle the Charge at Least Once a Month
Maximizing Battery Life in iPhone 3G
With such high-tech, power-hungry features that you're getting on the iPhone, it's no surprise that many users don't get the battery life that they'd like to. However, there are a number of simple ways to lengthen the time between charges, as well as prevent the premature need for battery replacement.