Our Automotive Smart Battery Charger/Maintainer easy connection to vehicle battery using battery clips or Oring terminals. Stops charging automatically when the battery is fully charged or topped off, switching to float mode monitoring. Built-in circuit protection guards against overcharging, reverse polarity, or short circuits. Sealed for protection against moisture, dust, and oil. This is a fully automatic battery charger with 3 charge stages. Automatic charging protects your battery against overcharging