Griot's Garage 92232 Battery Manager V Automatically Maintains Peak Battery Charge This battery manager is perfect for Cars, Trucks, RV's, Motorcycles, Boats & Generators It services 6- and 12-volt lead-acid batteries in a wide variety of battery types, including Conventional, Maintenance Free, AGM, Gel Cell, Spiral Wound, and Deep Cycle Advanced circuitry helps revive & maintain weak or dying batteries The Battery Manager V also includes reverse polarity protection, temperature compensation, short circuit protection, over-voltage protection, and a recovery mode to resume charging after power outages