Ensure you have power to spare to keep your feet toasty during your time outdoors by adding an extra battery or two to your ThermaCELL Proflex HD Heated Insoles. The high-capacity battery delivers up to 8.5 hours of warmth per charge. Charges up to 80% capacity in just 80 minutes. Includes rechargeable battery, USB cable and wall charger. Per 2. Type: Battery Packs.
