Odyssey AGM2 batteries are Thin Plate Pure Lead (TPPL) so more plates can fit into the battery. More plates means more power. Odyssey AGM2 TPPL batteries deliver up to twice the power and three times the service life of any other conventional battery, outperforming standard AGM or SLI (flooded) batteries in terms of power density, fast-charge acceptance, shel life, durability and most important - value for your money.