The Summit 10000 power bank combines lightweight and steady carbon fiber technology with a low temperature resistance up to -40° C/F. Normal power banks drop efficiency significantly in cold climates. Summit 10000 can still charge a modern smartphone two times over on top of Mount Everest, thanks to its intelligent heating function which kicks in when the temperature is below the freezing point. This heating function consumes ultra low power while keeping the power bank at an appropriate temperature to avoid loss of power or efficiency under cold climates. Also comes with an insulated carrying bag as well as a braided USB-C to C cable for reliable power transfer in cold weather. It takes power to make it to the top, so why not the Nitecore Summit 10000. Features Intelligent Heating Function IPX5 weatherproof rating Two-Way PD + QC output 10000mAh Power level display Low current mode Multiple protection safeguards For use in temperatures between -40°~20°C Specifications Cell Li-Ion Capacity 10,000mAh 3.85V (38.5Wh) Rated Energy 6,400mAh 5V (TYP 1A) Input USB-C: 5V⎓2.4A / 9V⎓2A Output USB-C: 5V⎓3A / 9V⎓2.22A / 12V⎓1.68A USB-A 5V⎓3A / 9V⎓2A / 12V⎓1.5A Dual Ports 5V⎓3A (MAX) Dimensions 125.5mm × 63.5mm × 14.5mm Weight 172g±5g Accessories USB-C to USB-C Charging Cable, Insulated Carry Bag Materials Carbon Fiber Reinforced Polymer (CFRP) constructed frame Carbon Fiber Sheets