Battery: li-polymer Input: 5V / 1A Output: 5V / 1A 5V / 2.1A Product weight: 225g Product features: - Double USB output ports plug and play; - Uses li-polymer battery; - Sufficient capacity and more cycle charge times; - Multiple protection (charging control charging protection discharging protection overload protection short-circuit protection); - The shell is made of good-feeling and wearable aluminum metal; - Good compatibility suitable for charging all kinds of mobile phones MP3 MP4 and other portable digital products; - Small size fashionable and beautiful appearance exquisite workmanship; - Easy to carry.