winch battries

[mudlux]

I have a Rotronics dual battery set up with a deep cycle in the back for the fridge ect. I have just instaled a winch and want dual battries for it as well. Can I just put another battery in the engine bay and hook it up to the main stating battrey which powers the winch, with out instaling a isolator ?
If I have two bateries 720 cca battries hooked in this manner, would that mean I have 1440 cca on tap to use ?
I would like to keep the deep cycle in the rear for the fridge ect. ???

[baby_troupe]

Yes you can, but remember your alternator will have to run hard to power all of these.
Might be an idea to consider an upgrade to the alternator.