The Hotronic S3 Power Plus Set is no longer available.
Please visit our current selection of boot heaters.
Hotronics S3 Power Plus Series Footwarmers
offer enhanced reliability, longevity, and performance over the previous Hotronic M Series and E Series batteries. The new S3 Series batteries maintain up to 55% of a full charge and 95% of their initial capacity after four years of non-use! Plus, an increase in capacity offers up to a combined 30% in higher average temperatures and longer durations on a single full charge in the cold!