Yuasa YTX H Series batteries offer even more increased power with up to 30% more cold cranking amps. Advanced lead-calcium technology – holds its specific gravity more than 3 times longer than conventional lead antimony batteries. Absorbed Glass Mat (AGM) separators absorb electrolyte making the battery nonspillable, the valve regulated design eliminates water loss and the need for refilling. Factory Activated (FA) – the battery is filled with electrolyte, sealed and charged at the factory. Size/Weight - Length: 9 1/8 in (205 mm), Width: 3 7/16 in (87 mm), Height: 7 3/8 in (162 mm), Weight with Acid (lbs.): 17.5; Specs - Capacity Ah: 21 @ 10HR, Regular Charge Current (Amp): 2.1, C.C.A. @ 0 °F (-18 °C): 350