I've used the electric socks in the past and they were pretty good. Only in temps below 30 and would just attach the battery for 45 mins then unattach it for an hour. Not too shabby. This year I purchased a pretty good pair of boots and they have done pretty well and traditionally I get cold feet pretty easy. I also bought a 10 pack of those single use toe warmers. I love them. I think I paid $10 for the pack and only used them when the temps were cold or I was going for a long sit. $10 a year isn't too bad for warm feet, plus I don't have to wash them. For anything else I think it would depend on where the battery was located and weight of course.