we took the generator in and had it checked out, and they told me it was good. They replaced the volts regulator at that time, as for the battery, not real sure. its not that old maybe 2 years, but has been charged alot. Just got a 6volt battery from local tractor supply company.Not understanding the 0 or 00 guage wire your talking about. What would be the difference. Think i just got battery cable wire and made them up. Does 6 volt wire for the battery different that 12 volt battery cables?