You don't give your batteries a day off — so your charger better be able to keep up. Our Digital on-board chargers are workhorse power plants that feature a microprocessor-based digital design to create a quick, safe charge, keeping you on the water all day, year after year. Chargers sense and adjust to ambient temperature fluctuations to ensure a fast, accurate charge. Microprocessor-based design delivers a faster, more precise charge every time. Inform of charge stage, maintenance mode status, error notifications and full charge. Controls the voltage and current your battery gets throughout the charging cycle, ensuring a fast, safe and precise charge. All on-board chargers are built to be waterproof, shock-resistant and vibration-resistant. Gel Battery Compatible - No.