Created for the outdoors enthusiast, the Celestron Elements ThermoCharge 3 Power Bank is a 2-in-1 multi-purpose tool built to help withstand the rigors of the field. Powered by a 3000mAh lithium-ion battery, it's a hand warmer and power bank with a 5V, 2.1A USB Type-A output that can charge USB devices such as smartphones and action cameras. When fully charged, the hand-warming function can provide up to four hours of heat at temperatures up to 113°F, and the power bank can charge an iPhone XS once and a GoPro Hero 2.5 times.