Battery Tender 022-0148-DL-WH 12-Volt 4-Bank Battery Management System 4 independent charging stations Lightweight design Microprocessor-controlled constant current charging Reverse-polarity protected Spark proof DC Output Cord Length: 4.5 feet - 18 AWG / DC Output Accessory Length: 1.5 feet Spark-proof and reverse polarity/short circuit protection and safety timer-72 hours Contains four independent stations capable of simultaneously charging at 12 volts/1.25 amps per charging bank Perfect for all AGM (absorbed glass mat), sealed maintenance free and flooded batteries Microprocessor-controlled constant current charging and temperature compensated to ensure optimum charge voltage according to ambient temperature Extremely lightweight at less than 3 lbs