Optima Fit

[Grench]

Optima D31A Vs 27F measurements

D31A
According to:
http://www.optimabatteries.com/publ.../product_info/commercial/technical_specs.html
It is 12 13/16" long, 6 1/2" wide and 9 3/8" tall. I can measure mine tonight if it is still relevant.

Type 27F
According to:
http://www.mbzponton.org/valueadded/technical/battery.htm
It is 12 1/16" long, 6 13/16" wide and 8 7/8" tall.

So, the Optima D31A compared to type 27F is:
3/4" longer
5/16" narrower
1/2" taller

Fit like a glove for me. They're not cheap though. The top of the battery is larger than the base by about 1" and the top is curved. The J hooks come up to the bracket essentially under the broader top on the battery.

 

[jamisobe]

Have you looked at the Odyssey Batteries?

http://www.odysseybatteries.com/

I was going to buy a deep cycle Optima for my auxillary, but the Odyssey is superior in both deep cycle and high cranking amp mode (think of the amps available if I switch the 6volt optimas for 6volt odysseys- then cross positives w/the aux- great for winches). It runs sprints and marathons. It also charges much quicker, has very high amp output, longer life/servives drain, its lighter, and its smaller.

The military is now using these little gems. I've yet to hear anything negative.

Here's a picture of my single tray dual battery set-up. I have yet to tidy it up real nice but it is solid.

 

[e9999]

OK, thanks, makes sense. It fits cuz of the taper...

D31A
According to:
http://www.optimabatteries.com/publ.../product_info/commercial/technical_specs.html
It is 12 13/16" long, 6 1/2" wide and 9 3/8" tall. I can measure mine tonight if it is still relevant.

Type 27F
According to:
http://www.mbzponton.org/valueadded/technical/battery.htm
It is 12 1/16" long, 6 13/16" wide and 8 7/8" tall.

So, the Optima D31A compared to type 27F is:
3/4" longer
5/16" narrower
1/2" taller

Fit like a glove for me. They're not cheap though. The top of the battery is larger than the base by about 1" and the top is curved. The J hooks come up to the bracket essentially under the broader top on the battery.