Automatic Smart Battery Charger for 6V and 12V Lead Acid Batteries Charger with 6/12V DC Output Voltage and Reverse Polarity Battery capacity: all types of 6V/12V lead-acid batteries (WET, MF, AGM and gel) Reverse polarity, overcharge and short-circuit protection Detachable and interchangeable lead sets, clamps and eyelet terminals Error beep warning with LED display