Needs to be powered by the alternator or your taco has no start power in the a.m plus why do u want a heated blanket campin do what i do when im at the duck marsh A. Sleep 2 in one bag (only if married god is watching) B. Sleep near a fire C. Pack lots of hot hands hand warmers D. And my favorite put lots of rocks near fire to get hot then outline your bag and they hold heat for hours and sleep on your back fat from the belly helps hold heat in and by the way a heated blanket is a TON EASIER