Willys Jeep Walkaround Part 5 5 Ford GPWImagine you open your hood to show the engine bay of your immaculate restored vehicle and it shows all details perfect except it has a brand new modern battery installed. 6 volt oldtimer battery 120 amph willys jeep ford gpw jeepster beetle willard in the old day´s these batteries where about 85 amph this one will produce 120 amph so it will startup like a 12 volt.