I have tried several pairs of mitts and gloves this year due to the extremely cold temperatures where i reside. Many of the pairs tried were battery powered and although all did a somewhat decent job of warming my hands none of them came close to the warmth nor sustained heat like these! Outstanding overall.
Prosselectable heat leaves
highest setting gets very hot!
good battery life
leather palm still allows me to grip steering wheel of truck / tractor / side by side
average glove when battery dies
don't know where to get replacement batteries if needed