This versatile flashlight and lantern don’t need any batteries, and is collapsible so it’s easy to storage and take along anywhere, when it’s collapsed it serves as a 2 power level flashlight, when it’s expended it serves as a 2 power level lantern. Also it can charge smart phones /MP3 and other digital devices. You can recharge it with dynamo power using the built in hand crank, or with the included USB cable.