Automatically Charges Battery 20 Amps for Charging Vehicle Battery Built-In 20 Amp Battery Saver Separate Ammeter Indicates Both Charger Output and Battery Saver Output Designed Specifically for Single Battery Vehicles Rugged Construction for Vehicle Mounting No Water Boil Off The Auto Charge 20/20 is a fully automatic battery charger with a very high output for vehicles with a single battery system. Remote voltage sensing is provided to compensate the charger output for the voltage drop in the charging wires. It is ruggedly constructed for mounting in the vehicle. May be used for positive and negative ground systems. | 