The Duracell Powermat GoPower Long Haul Backup 8800mAh battery allows you to never have to worry about being powerless again. The Long Haul provides maximum power on the go, with two high power output USB ports (up to 2.1A) allowing you to charge two devices at the same time. The Long Haul is perfect for a business trip or long weekend. Simply attach your device to the Long Haul with a USB cable, press the copper button and watch your device begin to charge. Due to its compact size the Long Haul is easily carried and ideal for the on the go individual who may need to charge their device more than once. The Long Haul can be recharged by connecting it to a USB power source, or by using any Duracell Powermat charging surface or PMA compatible surface.