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Designed to last longer than ever before, the Hotronic S4+ Boot Heater Spare Battery Pack gives you all the power you need to extend your day on the slopes. On those colder days when you don’t want to go just because your battery runs out on your foot warmers, theses spare batteries 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.
KEY FEATURES- Designed as a replacement battery pack for the Hotronic S4 Custom Boot Heaters
- Battery pack is easily securable to footwear