[Mgs] Two 12 volt batteries

[Charles Hill]

My only experience with running 2 12-volt batteries in parallel is with 
old Porsche 911s.  In the early 70s Porsche stuck twin batteries (2 12 
volts in parallel) as far forward as possible to improve weight 
distribution.  They were a constant problem.  Unless they were perfectly 
matched, the battery with the least internal resistance would get 
charged and the other wouldn't.  So while simply installing 2 batteries 
in parallel might not be a good idea, there are undoubtedly ways to do 
it today but they will be a little more involved than running an second 
set of battery cables. 

Charles Hill