Maintain batteries in the off-season with ease. Even if you are not using your batteries, they can lose their charge if left alone for long periods of time. West Marine charger/maintainers are a great way to keep your batteries charged while your boat, RV, antique vehicle or lawnmower is in storage. These compact maintainers are rugged and packed with features to simplify battery maintenance. Intuitive status indicators provide valuable information regarding battery condition and charge stage. The charger can be secured close to the battery using an integrated hook or by using its magnetic feet. Make sure your batteries are as eager as you are about the upcoming boating season by maintaining them in the off-season with a West Marine Battery Charger/Maintainer. Key Features Fully Automatic battery charger/maintainer that uses high frequency chargingtechnology IPX7 Waterproof: Sealed from dust, oil, and Moisture to prevent corrosion Keeps battery at optimal capacity during off-season Reverse polarity protection AC Low-voltage compensation ensures maximum performance when used with extension cords 3 Ways to Connect: Batter clips, 12V DC Accessory Plug & Battery Ring Terminals