MiPow SP8000A/M, both of them universal external battery, that are certified by Apple company. They are brother items that have similar design and same battery capacity 8000mAh. The SP8000A comes with one built-in 30-pin Apple tip, one built-in USB port and also one built-in micro USB port. While the SP8000M comes with one built-in Micro USB tip, one built-in USB port and also one micro USB port. Therefore, you can use the two to charge your iPhone, Samsung, HTC and other gadgets directly without using other cables or connectors. And also through those tips and ports, you can charge two gadgets or even three at the same time.