Minn Kota On-Board Digital Battery Charger - You don't give your batteries a day off — so your charger better be able to keep up. The Minn Kota On-Board Digital Battery Charger is a workhorse power plant that features a microprocessor-based digital design to create a quick, safe charge, keeping you on the water all day, year after year. Automatic Temperature Compensation: Chargers sense and adjust to ambient temperature fluctuations to ensure a fast, accurate charge Digital Control: Microprocessor-based design delivers a faster, more precise charge LED Indicator Lights: Inform of charge stage, maintenance mode status, error notifications and full charge Automatic Multi-Stage Charging: Controls the voltage and current your battery gets throughout the charging cycle, ensuring a fast, safe and precise charge Waterproof Construction: All on-board chargers are built to be waterproof, shock-resistant and vibration-resistant 3-Year Warranty: All battery chargers come with a full 3-year replacement warranty