Do the Fridge Freezers come with an internal battery? April 14, 2022 22:45 Updated No it does not. They must be plugged into either a DC or AC outlet. ARB does offer a ZERO Fridge Freezer Power Pack available for the ZERO line. Related articles ARB LINX (How to guide: TPMS trailer set-up) Which ARB Fridge Freezer should I choose? Does ARB USA have an Affiliate Program?