The Pro-12 keeps new batteries “factory-fresh”. Batteries that sit idle suffer from damaging sulfation buildup (lead sulfate deposits on the battery plates). This buildup is the main cause of battery problems and failure. The Pro-12 uses a scientifically proven ReNew-IT Pulse Technology® to keep these deposits off the plates. Includes fuse-protected quick-disconnect battery clamps and lugs, Important Safety Instructions and Quick-Start Guide. Fuse-protected, spark-proof unit is UL and CE certified. Five year warranty.