Minn Kota's line of on-board chargers delivers performance-matched power to get the most out of your trolling motor system. UL listed to Marine Standard 1236 FCC compliant, short circuit, reverse polarity, and ignition protected.Automatic Multi-Stage ChargingRecharges batteries faster and safely maintains them during storage.Automatic Temperature CompensationAdjusts output to ensure a full charge at any temperature.Shock & Vibration Resistant DesignStands up to harsh marine environments.Aluminum ConstructionIncludes cooling fins for efficient heat dissipation.Compact FootprintThe MK230 AND MK345 use the same hole pattern as most original equipment chargers, for easy replacement.Saltwater TestedTested for protection against corrosion.3-Year WarrantyManufacturer's 3-year warranty. Get a $25-$35 rebate with the purchase of model MK210, MK220, and MK315 MinnKota® On-Board Charger! Click here for REBATE details and to print coupon. Offer good on purchases made between 01/01/08 and 12/31/08.