Hotronic Battery Pack Power Plus S4

Don?t go inside just because your battery runs out on your foot warmers The Hotronic S4 Boot Heater Spare Battery Pack will give you hours of additional life on your Hotronic boot heaters Keep these spare batteries in your pockets and swap them out mid day to keep enjoying Mother Nature with toasty toes Duration Range Setting 1 16 5 ? 19 5 hours at an average temperature of 84F 95FSetting 2 7 ? 9 25 hours at an average temperature of 107F 118FSetting 3 5 ? 6 5 hours at an average temperature of 122F ? 132FSetting 4 2 5 ? 4 hours at an average temperature of 156F ? 168F Features Designed as a replacement battery pack for the Hotronic S4 Custom Boot Heaters Battery pack is easily securable to footwear