Not sure that I want to be rocketing down some ski slopes with lithium batteries strapped to my wrists. Then again, if it keeps me fingers warm and toasty, why not? These GoreTex gloves, the Heat-GX from Zanier are self-heating, and will stay hot for up to 10 hours, depending on the setting:
1 30?C 86?F 10 hrs
2* 37?C 98.6?F 4.5 hrs
3 55?C 131?F 2 hrs
* Setting 2 is the most common setting.
Of course, they’re not cheap, at $250.