The EcoScapes Rechargeable LED Lantern combines a centuries-old invention with the cutting-edge benefits of new technology including the unprecedented convenience of rechargeability for a true hybrid of past present and future. The lantern uses an internal lithium-ion battery as its primary power source with a micro USB cable included for recharging purposes. If this battery is depleted then the lantern switches to its backup power source: 3 D batteries. Meanwhile the lantern outshines other lighting products with its unique ability to function as a power bank for mobile devices. Just connect your smartphone to the USB charging port on the front of the lantern!