I got a pair of Karbon electric gloves last year. They work well enough, but the battery won't last a whole day, and I don't know where to get an extra set (not that I've looked that far). Sometimes I inadvertently must be pressing the button that resets the heating level without meaning to; I look down and it's not at the setting I left it on (it has three settings).
I also have a pair of non-electric Outdoor Research mittens with a pocket for the chemical heat pack that work well.
I also have a pair of non-electric Outdoor Research mittens with a pocket for the chemical heat pack that work well.