The myCharge AMPMAX is a Rechargeable 6700mAh battery with Smart-sense, which ensures complete device compatibility. It also has Max-power, which is maximum power transfer from powerbank (charger) to device. It is a High-density battery; the smallest and lightest powerbank and is Safe-cell, which means it provides the highest level of battery safety.The Rapid-recharge charges up to 50% faster than competitors including mophie, and the Hyper-charge assures ultra-fast charging of your devices; 65% faster than competitors. 1) Up to 4x extra battery, 2) 2.4A input max, 3) 2 USB ports deliver 2.4A output, 4) Four-light LED battery indicator, 5) Recharge via built-in USB cord. Black/Gray.