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My Panasonic was 5 1/2 years old and I just started to notice it cranking a little slower than it used to so decided to get a new one. Took a look through the forum and did a little research on what's out there. Hope this helps someone out.

I don't think there's any doubt this is the ultimate upgrade.
The DieHard Platinum PM-1 However at almost $300, it's a bit on the pricey side and since it's larger than the stocker, it requires at least a little modification to get it in and hook it up. It'll fit but it would put another 25 lbs on the front driver's side of the FJ which I don't need. I seriously thought about relocating the battery to the passenger side rear of the engine compartment and using this one though.

Also thought about the DieHard Platinum P-5 (Group 35) which fits right in and has about the same CCA as the stock Group 27F. However, it's a smaller battery than the stock one and the reserve capacity is only 100 minutes. Maybe not the best choice to use with a winch.

Optima makes a Red Top in Group 35 which is probably worth considering. They also make a Yellow Top in Group 35 but the CCA is a little lower than stock. Here's the link to their battery selector which is about the best way I can figure out to give a link to their site. These and the Platinum P-5 are right around $200 but the real turn-off for me was the lack of reserve capacity. They're probably great for a rig without a winch.

After thinking about it for a while I haven't had any problems with the Panasonic conventional wet cell so why not see what's out there for a regular old Group 27F replacement battery?

Believe it or not, as far as specs go, one of the better options may be the Duralast Gold Group 27F from Autozone. Same CCA as stock (710) and 165 minutes of reserve put it only 40 minutes behind the DieHard PM-1 and at 1/3 the price. The fairly low CCA and high reserve capacity suggest this battery is a little more of a deep-cycle design which should be a good thing for use with a winch. I'd be trying one of these out right now if my local Autozone had one in stock. I know there are probably plenty of haters out there who will say these batteries are junk but it has a 3 year free replacement warranty - same as Optima and the price is only $95.

What I ended up with is a DieHard Gold Group 27F. Specs on it are 750 CCA and 140 minutes of reserve so it's more of a starting battery than the Duralast. It still has a lot more reserve than the Platinum Group 35 though. This one also has a 3 year free replacement warranty so at $105 I figured it's worth a try. It's actually about 1/2" taller than the Panasonic but still fits fine with the stock holddowns.
 

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Discussion Starter #3
That looks like the DieHard PM-1 I listed as my first choice. They're $279 now. Looks like a great battery. The one thread I found on it made it look like you couldn't reach the stock cables to the posts. If you can, it makes this one a little better choice I think. Did you put in a new tray? Another thing that worried me about this one was a third of it being unsupported and no room to put a rigid tray in there to hold it.
 

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Thread revival. Thinking of plopping in one of the PM-1's on my '07. How did this work out for you? Anyone else?
Thanks! Scott
 

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I have the Odyssey 34/78 P1500 (backup) and the Diehard P-5 (Main)

Both work great
 

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Thanks guys. I like the idea of the big Die Hard (marine) for the extra juice, but having it flop outside of the tray may not be a good call for the long haul. $168 with sale/coupon (for the 35).
 

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My PM-1 battery in the oe tray has been getting a beating over the last year in rallies and what not.

The only thing I've noticed during this time was the negative wire stretching out from the crimp a bit, so I replaced it.

Other than that it has performed like a :king:



Dirt Devil by 08TTbrujablanca, on Flickr​
 

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Sears PM1 is on sale right now at $223 plus tax, just ordered one for store pick up:clap:

Want to know what those smaller cables are that attach to the wing nuts. Is that a mod? Do I need more parts to do that? What if I don't hook up to those at all and use only the posts?

Thanks for any help!
 

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Discussion Starter #13
I got one of the PM-1's on sale a few months ago. On my FJ, the negative connection wouldn't quite reach the battery post. It was only about 1/4" too short so I took a dremel tool and elongated the bolt hole on the connector that goes to the fender. That made it work.

Just an update on my original post. The DieHard Gold I got worked ok but it seemed a little weak right from the beginning. The voltage on it was always a little low even after a nice long drive so I think it probably had a weak cell. Should've gone with the PM-1 from the start. It's awesome.
 

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Cheers bruja! So, you'd say it's worth doing I take it?
Yes, I'd do it all over again, unless I got sponsored by Odyssey :bigthumb:

Sears PM1 is on sale right now at $223 plus tax, just ordered one for store pick up:clap:

:bigthumb:

Want to know what those smaller cables are that attach to the wing nuts. Is that a mod? Do I need more parts to do that? What if I don't hook up to those at all and use only the posts?

Thanks for any help!
I wondered about those too.
Those are the feeds to my Blue Seas auxiliary fuse box. You don't need to use those extra screw down terminals. Since the PM-1 is primarily a deep cycle marine battery, the manufacturer adds those extra terminals so you can easily attach additional items like fish finders/electric trolling motors etc.

I got one of the PM-1's on sale a few months ago. On my FJ, the negative connection wouldn't quite reach the battery post. It was only about 1/4" too short so I took a dremel tool and elongated the bolt hole on the connector that goes to the fender. That made it work.
Just an update on my original post. The DieHard Gold I got worked ok but it seemed a little weak right from the beginning. The voltage on it was always a little low even after a nice long drive so I think it probably had a weak cell. Should've gone with the PM-1 from the start. It's awesome.[/QUOTE]

I ended up having to replace that short piece of negative wire. Can you get a replacement battery under warranty?
 

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Thanks guys. I like the idea of the big Die Hard (marine) for the extra juice, but having it flop outside of the tray may not be a good call for the long haul. $168 with sale/coupon (for the 35).
Umh Kemosabe, Where get sale/coupon? Me want.
 

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Thanks Bruja, that's what I thought too since its a marine battery.

Re the sale price, it's back up to $255 instead of $223. I jumped on the sale at Sears website, and I was overseas in EU! Got to pick it up tonite!
 
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