Powermania Turbo M440V2 waterproof battery charger (Quad Bank, 40A) 12Volt Output - 4 Waterproof | Automatic 3-Stage Smart Charge (Fan-cooled) 3 User-Selectable charge profiles (Lead-acid/AGM, GEL, AGM+) Quad Bank | 40A (12/24/36/48V DC) | Individual Bank Status Indicator 10.75" x 7" x 3.25" | 120/240V AC Input (100% output at 90V AC) Charge fully-depleted (0-volt) batteries | Adaptive Loading (more amp to weaker bank)