6 Volt Vehicles > 6 to 12 Volt Converter Boxes   Negative Ground Radio Converter 6v to 12v Boosts 6 volts to 12 volts to use a 12 volt radio with a 6 volt system. PART #: 6Vv-NG-BOX $ 79.90          Unavailable      More Information Negative Ground Vehicle 6 Volts Boosted to 12 Volts Cigarette Lighter and USB Charge Your Cell Phone, GPS & Other Devices w/ 6 VOLTS! Boosts 6 volts to 12 volts. PART #: 6V-NG-CIG $ 89.99          Unavailable      More Information