Battery Tender 022-0158-1 Waterproof 24 Volt Power Tender Plus Battery Charger;

This water resistant, shock and vibration resistant, lightweight (less than 4 pounds) compact battery charger is designed for either portable operation or permanent mounting. Charges and maintains both flooded and sealed, maintenance free, AGM, and lead acid batteries. Float / maintenance function maintains batteries at proper storage voltage without the damaging effects caused by trickled chargers. The integrated smart controller assures that your battery is charged safely and correctly at all times through our ISM (Infinite Sequential Monitoring). The ISM adapts to the battery’s needs hundreds of times per second to deliver the proper amount of charge. With reverse polarity protection and spark-proof operation, you can connect it and forget it!