Additional Battery Packs extend total foot warming duration throughout extremely cold days.
With three (3) cells in each Battery Pack, the Power Plus e3 is Hotronic's most powerful-yet-compact Battery Pack!
WARNING: The Power Plus e3 Batteries can only be recharged using the Hotronic Power Plus e and m Series Recharger, with the white plugs.
Note: If you are purchasing the the Hotronic Battery Pack Power Plus "e" series batteries (e4 / e3) to replace a Hotronic Battery Pack Power Plus "m" series batteries (m4/m3), we recommend replacing both batteries. The "e" series batteries are warmer than the "m" series batteries on the same settings.
See our >> Comparison of e Series to m Series Temperature & Duration Chart
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