"Tim" wrote in message
...

Could be John. I have two bat. on my 23' marquis, just regular ol'
$29.95 L-cheapo's. one is the cabin bat. one is engine. through my
own design battery isolator, and unless the engine is running it
seperates both batteries.

running the 500w stereo, the wife's TV and I 've got 8 headlights
I've rigged on a pole for night swimming. I've run the cabin bat.
close to flat dead, and it recharges well. I really don't see any
need for a deep-cycle battery.

Evidently different engineers have different ideas.
I have my own ideas, but they don't listen to me.

Maybe for the better.

---------------------------

I've been seeing more and more batteries that are so-called "combination",
meaning deep cycle/starting.

I always used one deep cycle as the "house" battery and a regular battery as
the "start" battery.
If sitting at the dock or at anchor for an extended period of time with the
engine off, listening to the radio and/or watching the fish finder, I'd
switch over to the deep cycle.
When ready to start up, I'd switch to the "regular" or "both".

But, it's been a while since I had a boat set up this way. Things may have
changed over the years.

Eisboch