The Battery Tender Battery Charger 022-0336-ROT is a high-quality, compact battery charger designed to keep your battery fully charged and maintained. This charger features a 4-step charging program that automatically switches to float mode when the battery is fully charged, preventing overcharging. It also has reverse polarity protection and spark-proof technology for safe and easy use. The charger is compatible with all types of 12-volt lead-acid batteries and has a maximum output of 800mA. It comes with a 12-foot output cord and a 5-year warranty.