The Nitecore Summit 10000 Power Bank features a 10,000mAh battery capacity and combines lightweight and sturdy carbon fiber technology with a low temperature resistance to -40°F. The Summit 10000 can charge a modern smartphone two times over in extreme environments thanks to its intelligent heating function which kicks in when the temperature is below the freezing point. This heating function consumes minimal power while keeping the power bank at an appropriate temperature to avoid loss of power or efficiency. Along with an insulated carrying bag, this power bank comes with a braided USB-C cable.