Charge anywhere the power rock star 6600 combines magnetized cable storage with a powerful 6600 mah battery to make it even easier to stay charged on the go holding your specially designed lightning or micro usb cable securely in transit the power rock star means youll never be without a cable to charge your device with 3 4 amps to optimally charge two smartphones simultaneously via two usb ports or one tablet at top speed your back up power just got an upgrade 2 x usb with two usb po