Nitecore Summit Power Bank

Nitecore Summit Power Bank. 88" x 2.36" x 0.86". 10.69 oz. Max output of 20W and a max input of 18W. Continuous use at -40? and its available capacity is up to 70percent at -20?. Equipped with the PI heating system to ensure that the battery can work a an appropriate temperature for reducing the loss of power. Carbon fiber confined structure also guarantees the thermal insulation in low temperature environments. Preheating function with no power consumption/charging protection/heating.Low tempe