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 temperature accessories included: insulation carrying bag/USB-C to USB-C charging cable. Unibody shell construction without splicing to achieve optimal protection. 1.5m impact resistant IPX5 rated. Specifications for Nitecore Summit 20000 Power Bank: Manufacturer: Nitecore Battery Quantity: 1 Weight: 1.08 lb Included Accessories: Insulation Carrying Bag/Usb-C To Usb-C Charging Cable Battery Type: Internal Battery Battery Chemistry: Lithium Ion Package Contents: Nitecore Summit 20000 Power Bank