AME heated grip system. Includes grips, Lithium Ion batteries, handlebar/frame mount.

3 years old but used maybe 24 times. Run time depends on your setting but at least an hour and you don't need to run them the whole time. These things are great but I moved South and don't need them anymore.

Heres more info: https://fat-bike.com/2016/04/review-...ustin-carlson/