Hotronic  Battery Pack S4+ Power Plus

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Powering your compatible insoles for long-lasting comfort in freezing weather, the Hotronic S4+ Power Plus battery pack helps to keep your feet toasty warm.


  • Designed for use with prewired Anatomic Insoles or with Heating Elements installed in Hotronic Heat Ready Insoles or custom insoles and orthotics (not included)
  • Includes 1 battery pack; contains 4 batteries total
  • Additional battery packs (not included) extend total warming duration for extremely cold days
  • S-series NiMH batteries maintain up to 55% of a full charge and 95% of their initial capacity after 4 years of nonuse
  • An increase in capacity over past models offers up to a combined 30% higher average temperatures and longer durations on a single full charge in the cold
  • Hotronic NiMH batteries do not have a memory effect and thus do not require a full discharge before fully recharging


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Technical Specs

Item #183065
Best Use




Battery Type


Battery Size

Special Purpose


0.4 pounds

1 reviews with an average rating of 5.0 out of 5 stars

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