... 1. High capacity: With high capacity Li-ion batteries.2. Long life: rechargeable Li-polymer batteries, up to more than 500 circles, the ... , overloading, and short circuit.Specification:Internal Battery type: Li-ion Capacity: 20000mAh(3.7V)/6600mAh(11.1V)/74WhInput: DC 15 ... these instructions in case of improper use of Li-polymer batteries which can be dangerous and cause overheating, smoke, fire… ...