Stay warm on the trail and keep your portable electronic devices charged using the Celestron Elements ThermoCharge Power Pack. This 2-in-1 hand warmer and battery pack heats up to a maximum temperature of 113°F, while the 4400mAh rechargeable battery not only provides up to six hours of continuous heat on a full charge, but is also able to recharge most smartphones, MP3 players, cameras, and other devices that are powered by USB. The USB Type-A port on the ThermoCharge charges devices at 1.0A.

The ThermoCharge does not use chemicals to keep your hands warm and is safe and scent-free. Once depleted, the battery can be recharged using the integrated mini-USB port at a rate of 900mAh. Physical protection is provided by its rugged aluminum housing and silicone end caps, and additional protection is provided by a limited two-year warranty that is valid from the original date of purchase, with proof of purchase. Included with the Elements ThermoCharge is a USB charging cable and a soft carry pouch.