Whether you own a Nokia, Samsung, LG, BlackBerry, or iPhone 4, use this tip for your multi-tasking machine.
Change your settings. Reduce display brightness to as low as you find readable (or set to 'auto'), and turn off Wi-Fi and Bluetooth when you're not using them, so they aren't constantly scanning. Unplug your phone when it's at max charge - leaving it plugged in heats up the battery, causing it to wear out faster.
