Solar PL2135 6/12V 3.5 Amp Pro-Logix Battery Maintainer from Clore Automotive controls each phase of the charging process to ensure that each battery serviced gets an optimal charge. It is compatible with a wide variety of battery types, including conventional, AGM, Gel Cell, Spiral Wound, Marine and Deep Cycle batteries. Operation is fully automatic, freeing the operator for other tasks and delivering the same consistent, beneficial charge every time. It charges and maintains the batteries in motorsports, lawn and garden, automotive, truck, RV, agriculture and marine applications. In addition, it features polarity protection, outputting current only when a proper battery connection has been made and protecting against many forms of operator error.