Marine Master starting batteries have calcium alloy frame grids and plates for minimum maintenance, deep pocket plate separators preventing short circuits and de mineralized electrolyte preventing water loss. A leak proof and vibration resistant designs to help prolong the life of the battery. Starting batteries are typically used for the starting of both gasoline and diesel inboards, outboard and inboard/outboard boat motors plus routine electronic equipment powering. All batteries carry a 1 year pro rated warranty. 12.5" x 9.375" x 6.75".