Love these batteries. One in my motorcycle is 12 years old! Still working great. I put these batteries in our VW TDIs, which take a lot of battery to start at -20 Deg. F. First the 4 glow plugs light, big drain. Then the very cold engine needs to turn over. These batteries do it! PPL, pure plate lead technology. The only batteries with this that I am aware of. They to last, never had a failure to date. The first crank, about 7 seconds has 3 times the CCA number. Really spins over in the cold.