THERM-IC C-PACK 1300 B & 1700 B BATTERIES The C-Pack 1300 B and 1700 B are advanced, high-capacity batteries suitable for powering Therm-ic's heated insoles. These batteries deliver long-lasting heat making them a great choice for outdoor enthusiasts, athletes, and anyone who needs reliable warmth in cold weather. The C-Pack batteries come with three heat settings to help keep your feet warm all day long. Fitted with Bluetooth technology, the C-Pack batteries allow you to remotely control your heat settings via your smartphone using the Thermic Heat Control App. The app provides increased adjustability, personalization, and battery life through accessing 10 different heat levels, motion control, and eco mode. The C-Pack batteries are suitable for use with Therm-ic Insoles Heat Flat, Heat 3D and Heat Kit range only. FEATURES: - C-Pack comes with a USB charger; - Wall charger not supplied; - Includes 3 manually controllable heat settings via a single control button; - Fitted with Bluetooth technology allowing you to control all 10 heat settings via your smartphone, using the Thermic Heat Control App; - The C-pack 1300B battery provides up to 13 hours of warming; - The C-pack 1700 B batteries provide up to 17 hours of heat.