They say the Battery can be mounted in ANY direction.
Upside down, or on its side, So i dont think the
Optima is Vented.

Heres a link to Sean B's Optima installation:

http://www.vgonman.com/auxbat.htm

Good Luck!

Phil

--- Dan Aldrich <daldrich@EARTHLINK.NET> wrote:
> I need to start thinking of replacing the battery in
> my 1999 EVC and was thinking about the Optima deep
> cycle. These units appear to have little black vents
> on the top. The current battery in my EVC needs
> replenishment every so often from deep cycling it
> which one would expect. What makes the Optima
> different that they don't need levels checked? They
> still vent gasses don't they?
>
> Thanks,
> -d

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