Need new start battery for GU - are the Optima yellow tops still worth it ?

FWIW: I too years ago was under the impression that nearly but not quite 1,000 CCA Optima Red’s & Odyssey Red’s were the Bee’s Knees for in the day 2.5hp Warn High Mount Comp winches [emoji23][emoji107][emoji107]
Big horsepower race crankers like reds get destroyed by winch sucking adventures and your new D31A weapon has the best of both worlds John with circa 900 CCA and a capability of Deep Sucking Cycle TOUGH [emoji23][emoji106][emoji106][emoji106][emoji106][emoji106][emoji106][emoji106][emoji106][emoji106][emoji106][emoji106]



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It always started well when the old battery was charged but now it's really instant.

You’ve made a Top Purchase there John Mate!
Just ran my new GQ D31 parallel pairs through a full maintenance/health check after completely pushing them to their limits down in Tassie [emoji51]
http://www.nissanpatrol.com.au/forum...021/04/112.jpg
They’ve thankfully made it all the way to ‘Stage 7- Happy Maintenance Trickle’ (NO stuffed coils/plates)
GREAT BATTERIES [emoji367][emoji106][emoji106]


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Finally got back to this battery installation to get it finished. Wasn’t really sure how to make a cover for the positive terminal and settled on some red acrylic that could be shaped a bit with the heat gun.
A 3mm stainless screw fits nicely into the gap to hold it on.
The cutout where the 8mm thread is showing is to clamp the battery charger when needed.

Attachment 83465

Very very neat John.
Love those terminals!!

Nice Job!

I like those terminals too, although perhaps the 4 bolt version the same seller has might suit me. Can you tell a bit more about the making of the +ve terminal cover? Just flat acrylic sheet over the top? How is it attached? Where did you get the acrylic?

It’s rolled under the flat of the factory cable on the engine side and screwed down by the small screw you see there. Didn’t have to drill, the screw tightened nicely in the space there.
Just heated the end to roll it under. I’ll take a pic of the end tomorrow.

Acrylic sheet here:
https://www.ebay.com.au/itm/Coloured....m46890.l49286

Some closer pics of the bent acrylic.

Attachment 83470Attachment 83471

Top notch [emoji108] really nice work.
This is something I just wouldn't have thought of doing. Thanks for sharing.

In need of a new battery. I am aiming for the d31a.
I noticed the M variant D31M is identical to D31A Yellow top. But it has a bonus threaded hole to attach things to.
Is there a reason you didn't go for that one John???

I didn’t even look at the different variations available but I don’t think I’d have changed for a couple of extra holes. Most seem to run the yellow tops and the D31A drops exactly in.
With those multi connection terminals I got I didn’t really need connections elsewhere.

If it’s the same specs and you think those extra holes are useful for you then why not..

As far as I understand the M is Marine, stainless terminals and possibly a very slight CCA & AH difference but negligible. Dollars I think would be higher for an M as I seem to remember paying approximately 10% extra for my tinnies D27 years ago versus yellow top variants in other trucks.


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Thank you legends!!

On paper, theyre the same CCA. Same everything really. One is blue one is yellow. One has extra threaded hole, perfect for a winch hook up and my upgraded Alt-to-Batt cable... 10-15 $$$ difference.
Had me stumped why blue-tops arent all the rage. ..

https://www.optimabatteries.com/products/yellowtop-d31a

https://www.optimabatteries.com/products/bluetop-d31m

Well thanks to this thread I grabbed a D27F.
It dropped straight in and the terminals were in the right spot.
It'll do me as a starter battery.