Slightly off topic, but I did want to mention that I have tried heated gloves today, for the first time. Seems to work for me, at least I came back with only slightly cool fingers after driving around for half an hour on the open road with these:
Temperature is in the low 30's / 0° Celsius around here today. With my normal winter gloves I would have suffered from the cold, especially because i did drive at up to 80+mph.
So personally, I will use these instead of heated grips in the future.