Need batter to replace Sears Diehard Platinum 31M

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Bryan E.

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Hello,

Finally rebuilt my starter and now realizing my battery, Sears Diehard Platinum 31M won't hold a charge. Sad to see that Sears no longer sells this battery.

Plans in future to add a winch but none now. What's the best deal in a battery? 2017? Old posts seem no longer relavant as selections change with the times. One note; my local stores CCA are less than same battery in past as they say the Texas heat kills batteries with thicker plates which run hotter. Anyway... I just need a good new battery.

This is for a Dallas area vehicle. Thank you.
 
I am switching everything over to the AGM type of battery. Its expensive but my hope is that in the long run it'll be a wash. One really nice thing about the AGM is that they can be shipped.
 
I had the optimas but they got worse and worse so after the third failure I now have an interstate and its been perfect almost a year and the cruiser sits quite a bit, plus the battery was out of the truck in the garage for over a month and started right up when I reinstalled it[after moving the washer fluid bottle and installing second battery tray]
 
I reread my post above and realized I didn't mention where I got most of my batteries. Orielly auto parts.
 
Bryan E. said:
Hmmm... 1/3 more than I paid for this one but I do like the warranty. I'll look into that one.

Who makes that battery?
Click to expand...

Northstar makes that battery. Northstar is a Swedish company but the battery is manufactured in the U.S. I think the same battery is sold under the Northstar name and distributed by Exide.

Optima AGM batteries (spiral wound) should not be compared with AGM plate style batteries. I went through 4 Optima's in my Mustang in the 90's and was told by Mopac in Canada that failures were very common. (Two Red and Two Yellow top.)
 
I'm a big Optima fan. I have a yellow top in the cruiser. It always holds 13+ volts, and always starts even in subzero weather. I use red tops at work in back up generators on remote mountain tops. They just work, and you can find them anywhere. I also trickle charge them with a battery tender periodically. I would guess in the last ten years I have personally purchased and installed north of 40 Optima's. The only "problem" I have ever had was due to my own idiocy. I ran two red tops in series off of the side posts, then attached a readywelder and proceeded to burn through 4 pounds of wire. The terminals overheated and literally melted the lead out. This battery still holds a charge. It would not have happened had I used the large terminals on top.

 
jeffro109 said:
I replaced my 31M with the Batteries Plus higher end AGM 27F size:
SLI27FAGMDP - X2Power Premium AGM Car and Truck Battery at Batteries Plus Bulbs

seems to work fine for starting and mild winching that I do, and runs the fridge for a long weekend (3 days) without needing shore power or engine starting to recharge it.
Click to expand...
I also replaced my platinum 31M with the Batteries Plus AGM. I've had it for almost 2 years and no worries. Batteries Plus warranty is what sold me.
 
jeffro109 said:
I replaced my 31M with the Batteries Plus higher end AGM 27F size:
SLI27FAGMDP - X2Power Premium AGM Car and Truck Battery at Batteries Plus Bulbs

seems to work fine for starting and mild winching that I do, and runs the fridge for a long weekend (3 days) without needing shore power or engine starting to recharge it.
Click to expand...


Hello,

Thanks to everybody that's replied to my question. I appreciate this recommendation. After checking everything out, looks like my old Die Hard PLatinium was 6 1/2 yrs old. Haven't been driving it as much in last few years but it's toast. After doing the research, this X2 battery seems like a good replacement. The warranty is what does it for me, 5 yr full replacement, and it sure seems like a very well built battery. Working now to order this one on line, to save 10% then will pick up in the store. Wish it saved me sales tax too... LOL.

Thanks for your help.

B
 
Find yourself a Interstate outlet, and ask if they have any "blems" I have done this when i have had to replace a pair of group31's on my roll off truck. Brand new battery half the cost:flipoff2:
 
You run the best tires you can find, or do you carry a spare?

Using same logic; I have Dual Batteries.

They are Costco batteries, and I would bet my wallet that both will not fail at same time.
 
jeffro109 said:
I replaced my 31M with the Batteries Plus higher end AGM 27F size:
SLI27FAGMDP - X2Power Premium AGM Car and Truck Battery at Batteries Plus Bulbs

seems to work fine for starting and mild winching that I do, and runs the fridge for a long weekend (3 days) without needing shore power or engine starting to recharge it.
Click to expand...

Hey Jeffro109,

Question about this X2Power battery. My factory cables barely reached on the Diehard P 31M battery. On this one, the terminals are on the wrong side as I need positive +, on left and ground negative -, on right when facing the front of truck. Can I just rotate this battery so the front view shown in the pictures is pointed to rear of vehicle? That would seem to work and put the terminals where I need them. Reason I ask before I order it is that I haven't found another view of the battery on line, not even the manufacturers web site.

If i have to get new cables, I would like to know in advance. Any pics of it installed in your cruiser?


Thank You,

Bryan Enoch
 
ppc said:
Yes, the 27F is the stock battery size/group designation. The "F" in 27F stands for Ford which is a reverse termial battery from the Group 27.
Click to expand...
Or a 34R (R is for reversed posts).
 
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