Spare battery with 3 NiMH cells for your Hotronic e3 foot-warmer, re-chargeable in just 3 hours. Plug in overnight for a full days warmth next day. Incorporates advanced charging technology with overcharge protection.
Choose from four different temperature settings. The warmer you have them, the less time they last but, in our experience levels 1 or 2 are warm enough for skiing because your feet are active and generate their own heat as well. For sedentary uses, crank up the temperature setting.
NiMH cells do NOT have 'memory effect' and do NOT require fully discharging before recharging.
Temperature and Duration Ratings
- Level 1 lasts approximately 14.5 - 17.75 hours at 29° - 35° C (84° - 95° F)
- Level 2 lasts approximately 5.5 - 7 hours at 42° - 48° C (107° - 118° F)
- Level 3 lasts approximately 3.5 - 5.5 hours at 50° - 56° C (122° - 132° F)
- Level 4 lasts approximately 2 - 3.5 hours at 70° - 76° C (158° - 168° F)
Based on tests conducted at -20° - -15°C (-9° - +4°F) ie very cold conditions indeed!