Nitecore 20000mAh waterproof powerbank - perfect companion in every kind of weather. Charging ports with O-rings. 1m shockproof, 2m submersive. Scratch-proof shell, compact and lightweight. Powerbank can be used even with -10C outside. Inside the bank is a next generation 21700 Li-ion cell that is considered the future of silindrical cells. QualComm 3.0 output ensures fast and comfortable charging process, max 18W. LED indicators with touch sensor show the remaining power. Overcharging, overvoltage, short circuit protection. Thermal regulation function.