One charger for at home or on the go, this RAVPower 6700mAh Power Bank with Dual USB Wall Charger comes with a built-in dual USB wall charger. While charging your device at home, the power bank is charged as well. The upgraded 6700mAh power bank gives smartphones more than one full charge. Features a high 3A output current with two charging ports that will enable you to charge two devices at full speed. Also charges tablets as well and just as fast!