Great for emergencies, camping and patio! This lantern uses an internal 4400mAh lithium-ion battery as its primary power source, with a micro USB cable included for recharging the lantern. This lantern outshines all others with its unique ability to run on either lithium ion batteries or alkaline batteries. If the lithium ion battery is depleted, then the lantern switches to its backup power source, 3D alkaline batteries (not included). the lantern can also be used as a power bank for charging all your mobile devices. Just connect your smartphone to the USB charging port on the front of the lantern! IP54 rated and backed by a 5-year limited and lifetime LED. Rethink recharge-ability with the End Bright End rechargeable LED lantern.