Fully Automatic Multi-Stage Charging Charge, condition and maintain batteries with a built-in safe maintenance mode. Single Preset Charging Profile Use with Flooded (Lead-Acid) or GEL batteries. Expanded LED Status CenterAt-a-glance AC power, charging and ready / maintain LED indicators. Distributed-On-Demand Technology Automatically charges and maintains your engine crank battery while distributing all remaining charging amps to your trolling motor batterie(s). Built-in Quality and Safety 100% epoxy filled - Completely waterproof and shockproof. Dual in-line DC safety fuses (multi-bank models), reverse polarity, ignition and temperature protection. Battery Type: Group 24-31 Flooded and Gel batteries.