Hello,
I checked the previous posts and Battery faq but I still need a little
advice regarding my boat batteries. (I've been shocked countless times
and had two near hits with lightning so electricity and I have a
dysfunctional relationship probably aggrevated by my own stupidity.)

I own a 2000 Bayliner 2152 and it has two batteries. There is a switch
for 1, 2, All, and None.
I understand the concept about how the batteries are isolated.
So what do I set the switch at? What is the None setting for? Which
battery is 1 and which is 2?
I fear having a dead battery at sea on startup.With my luck, having
two dead batteries is just as easy as having one.

Thanks
Charles