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Adjust the screen brightness.  The default setting for your screen is probably brighter than it needs to be, and the display is the single largest consumer of battery power on your phone. Turn it down to the lowest level that still comfortable to see. Sleep sooner . Your phone lets you specify how quickly to turn off the display and put the phone to sleep. You can extend the life of your phone significantly by ensuring the phone turns itself off quickly rather than staying on for several minutes every time you check the time. Turn off notifications.  Many apps enable display notifications. Most of the time, these are pointless and a waste of battery power since they force your screen to light up briefly many times throughout the day. Disable apps' notifications to extend  battery power. Disable any antennas not in use.  Never (or only rarely) use Bluetooth. Make sure it's turned off in your settings. The same is true of Wi-Fi, though if you're like most people, you p