replace small scooter battery with car battery??

[Gene563]

I had charging issues with my 150cc, TaoTao.
It turned out to be the Regulator/Rectifier being wired incorrectly.
With a full charge, I would get a while of use, before the brake lights, tail lights, and starting would take it's toll. Recharge, start over.
I checked the stator and replaced the R/R. with no change. My suspicion was no charging voltage, verified at the battery with bike running.
I made short jumpers and moved the connections around until I had charge V, and bright lights (another problem that I really hadn't noticed).
Since then, I never had a charge issue again for 1.5 years; just sold the bike, still good.
I know you didn't want to hear solutions, but this was monumental to me.
Reply or PM if you'd like more info.