Yuasa YUAM320BS YTX20L-BS Battery 12 Volt, 18 amp-hour, 270 cold cranking amps, maintenance-free battery Totally sealed and spill-proof - all acid is absorbed in special plates and absorbed glass mat separators No need to ever add water Advanced lead-calcium technology hold its specific gravity more than 3 times longer than conventional batteries Battery supplied dry with acid bottle Dimensions: 6.87" x 3.43" x 6.12"