Renogy Deep Cycle Battery chargers offer an ideal way to maintain and charge your Deep Cycle 12V batteries when solar is not available. Designed for plug-and-play use, these units can charge Flooded, Gel, AGM, and Lithium batteries using multi-stage charging for the most efficient charge based on the batteries needs without overcharging. It is the perfect addition for any deep-cycle battery bank to help maximize and prolong the batteries life. Renogy also offers easy to use Battery Maintainer Chargers to keep your battery topped off at a stable level. Never be caught flat ever again!