[Purdy Swoft]

I don't use an 8 volt battery. I do know that my completely stock original 6 volt model A generator fully charges my 12 volt battery. The model A generator will charge whatever battery that it is connected to up to 40 volts . The generator charges in amps. Using an 8 volt battery could very well shorten 6 volt bulb life . Original type bulbs are pretty cheap and would last a while . The best bet for a more powerfull electrical system is a 12 volt conversion. A 12 volt positive ground conversion doesn't require changing a single wire . Good 12 volt bulbs are readily available that fit the original sockets , even halogen