Do you want to extend the battery life of your smartphone as much as possible? Since phones have an integrated rechargeable battery that can only be recharged a few thousand times, the more efficient you are, the better you can extend the lifespan of the battery. One simple way is to use the Wi-Fi connection as much as possible. The reason is simple: A Wi-Fi connection uses less power to access data than a cellular network. Another simple tip is to adjust the brightness of the screen. Just go into your phone's settings and dim the brightness level, or use the auto brightness setting. It will automatically adjust the screen's brightness to wherever you are, whether it's outside in the bright sun or inside in a dark room.