Batteries for heated insoles - C-Pack 1300B

"With the C-Pack 1300 Bluetooth battery, you can control the strength of your heat remotely using your smartphone. Specifications: -Up to 13 hours of heat -Comes with a single control button -Pack comes with a USB charger -Wall charger not supplied -Suitable for use with Therm-ic Insoles Heat Flat, Heat 3D and Heat Kit range only."