Thanks to rugged construction and AGM (Absorbed Glass Mat) design, the Enersys Odyssey PC310 battery has an 8-12 year design life and a 3-10 year service life. Welded intercell connections enable it to withstand extreme vibration, and AGM design holds acid in place to prevent spills, even when installed on its side. And unlike conventional batteries, Enersys Odyssey PC310 batteries can be stored for up to 2 years and still be returned to full power at 25 degree celcius storage temperature. Specification: * 310 cranking amps for 5 seconds * 250 cranking amps for 10 seconds * 225 cranking amps for 20 seconds * 200 cranking amps for 30 seconds * 8 Ah * Short circuit current over 455A * 9 minute reserve capacity with 25amp load * CCA - 100 * Dimentions : 138mm Long X 86mm Wide X 101mm High * Designed and built to last up to 3 times as long Some batteries provide enormous cranking power. Others, deep cycle reserve power. The revolutionary Enersys Odyssey PC310 battery is designed to do both. How is this possible? The answer begins with flat plates made of 99.99 percent pure virgin lead - not lead alloy. Pure lead plates can be made thinner, so we can fit more of them in the battery. More Enersys Oyssey PC310 battery plates mean more plate surface area. And that means more power upto twice as much as conventional batteries.