The GMP16K is a charging powerhouse with its stylish design and ultra large capacity. Packing a colossal 16,000mAh capacity, the GMP16K is by far the largest battery that IOGEAR offers. With dual USB ports, the GMP16K can charge two devices at the same time. The GMP16K is capable of fully recharging mobile devices such as the iPhone 6 more than eight times and the Samsung Galaxy Tab S more than two times. The GMP16K is the perfect for camping trips or travelers as a single charge can easily keep all your devices charged. You'll be surprised how seldom you actually have to charge this battery pack due to its immense capacity.