6/12V 4.0 Amp Pro-Logix Automatic Battery - Charger/Maintainer Utilizes an advanced multi-phase charging process to deliver an optimal charge to each battery services. No guesswork or mystery. Functions as an advanced battery maintainer. Conditions and maintains batteries in long term storage. Can be programmed to recover automatically from power outages. Compatible with a wide variety of battery types including conventional, AGM, Gel Cell, Spiral Wound, Deep Cycle and marine. Battery repair and soft start modes automatically commence with needed to effectively manage sulfated or deeply discharged batteries PL2140