12 Volt, 8 amp-hour, 135 cold cranking amps, maintenance-free battery Totally sealed and spill-proof - all acid is absorbed in special plates and absorbed glass mat separators Factory activated - filled, sealed and charged at the factory Advanced lead-calcium technology hold its specific gravity more than 3 times longer than conventional batteries No need to ever add water Packs more power, discharges less in storage and has a longer life than conventional batteries Spill-proof design and construction have passed vibration and pressure differential spill-proof tests Acid is absorbed in special plates and AGM separators Note: This battery is factory activated and sealed. No additional acid is needed and no acid manipulation is required