Known issue of a parasitic battery drain even if these grips are shut off. Koso recommends hooking up to switched power yes provides a harness to battery.
With our on/off switch you can disable the Koso grips to prevent a drain.
Billet aluminum housing
Sealed on/off switch
Plug and ride with the Koso 40-4113
Any snowbike running the Koso heated grips PN 40-4113