Yuasa Ytx20Ch Factory Activated AGM High Performance Battery The Maintenance Free battery features gas recombination technology eliminating water loss. It also has longer periods between charges when the battery is in standby mode and high-gravity acid at time of installation for factory freshness. Features: Heavy-duty terminals patent pending Flush-mounted terminals with no spacers needed AGM (Absorbed Glass Mat) separators with superior grid and component designs Improved charge recovery capability from a deeply discharged condition Features a higher capacity and longer life Spill-proof design and extreme vibration resistance Dimensions: 6 long, 3 7/16 wide, 6 3/8 high 270 CCA (Cold Cranking Amps) 18 AH capacity 1 year manufacturer warranty Acid included Factory activated Battery Terminal Location: Note: Product may vary from photo. Charge and test all batteries prior to using. This battery is for use on certain BMW models equipped with Factory alarm (Dwa).