depends on how you hook it up. you might get a longer lasting 12Volts or you might get 24 volts and burn stuff up. why do you want 2 batterys? if to have power and still be able to strat the truck after killing the battery then you got a couple ways to go. a battery isolator and run after market stuff to the 2nd battery. you can get a battery selector switch and eather select the battery when needed or add a 2nd alt to your motor to power keep charging the 2nd battery.
ok in the motor home i got an isolator this will use one alt and charge 2 batterys
in my Bronco i going to install a selector dial (like on a boat) so i can go any comb of connections i want. they are both cheap and easy to install......mike
ok in the motor home i got an isolator this will use one alt and charge 2 batterys
in my Bronco i going to install a selector dial (like on a boat) so i can go any comb of connections i want. they are both cheap and easy to install......mike