I have a yellow top Optima, I'll have to check the size, but I believe it
is a group 41, & in order to install it, I had to notch the steel (Sawzall)
under the seat a tad to clear the top posts when tipping said battery on
its side, so that it could easily lay there.  I then used the side posts to
connect it.  I also put a piece of 2 x 4 on 1 end of the compartment to
hold the battery in place , side to side.  W/ this installation, the cover
will fit flush, unlike if the top posts are facing up.

YMMV,

Mr. BZ-let the battery thread wars begin!

On Wed, Dec 26, 2012 at 8:16 AM, Harry Hoffman <hhoffman@ip-solutions.net>wrote:

> Hi All,
>
> Is anyone using a optima battery under the driver's seat? If so, would
> you mind sharing the model number (and/or physical measurements).
>
> Advanced Auto Parts is having a 25% off sale (BATX code) and it's time
> to switch out the old ups batteries I'd tried to use.
>
> Cheers,
> Harry
>

--
Tom Buese