Mine is the 36 volt EZ GO & I'd guess 10 miles would be a SWAG as to how many miles before it's down to 50% & I recharge.
My back seat folds down to create a platform like flat bed truck & that's how I use regularly.
I also agree that the problem with the gas ones is the gasoline or rather the ethanol in the gasoline, it's very detrimental to small engines that don't run often enough to burn a tank full so requires additives so the fuel doesn't crystallize like old honey in the tank & fuel lines.
I actually added emblems so now DW has her Cadillac
Boy! That's so aggravating, they always post sideways!!!