Low temperature powerbank 20000mAh Powerbank Nitecore Summit 20000 offers high capacity of 20000 mAh, combined with impressive resistance to low temperatures -40°C/F. Unlike other power banks that lose performance at low temperatures, Summit 20000 can still charge a modern phone up to 4.6 times even at the top of Mount Everest. When the temperature falls below zero, an intelligent heating function Summit 20000 is activated, using very little energy to maintain optimal temperature and prevent power loss or inefficiency. The summit 20000 also contains an isolated carrying bag and a reliable braided USB-C cable to C, providing a smooth energy transfer. If you are going to the top, make sure you have the powerbank Nitecore Summit 20,000.