Only the ProMariner ProSport Onboard Battery Charger provides automatic installation feedback with exclusive System Check OK and Battery Bank Trouble LED indicators. After fully charging/conditioning batteries, ProSports Energy Saver mode will monitor batteries and automatically maintain batteries only when needed to maintain a full state of charge, resulting in maximum reserve power performance and lower operating costs. Features include safety ignition, reverse polarity, over temperature and voltage protection, and current limiting. The lightweight ProMariner ProSport Gen 3 Onboard Battery Charger checks-in 40% lighter than older-technology epoxy-filled chargers. Distributed-On-Demand charging technology takes 100% of the available charging amps and distributes them to any one battery or combination of all batteries as needed for faster charging. Multistage charging delivers fast charge times, and all models have two digitally selectable performance charge profiles for Flooded/AGM and GEL batteries. During short- or long-term storage, ProSport Chargers automatically recondition batteries once a month, extending the life and performance of your batteries. Any avid boater seeking a boat battery charger with the ideal balance of features and value will appreciate the performance a ProMariner marine battery charger can deliver every time. Manufacturers two-year limited warranty. Available: 12 Gen 3, 20 Plus Gen 3, 1.5-Amp Maintainer. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Onboard Battery Charger.