AGM battery help please

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Apr 8, 2023 | 07:13 PM

#41

d.moscatelli@comcast

Advanced

Joined: Feb 2023

Posts: 93

Likes: 12

Ok, so after reading all the posts about batteries, I was more confused than when I first started reading.

So this morning I just went to Auto Zone and purchased an Optima Yellow top. I called Optima tech support and that is what they suggested for my 98. I guess I'll live with that until it fails. Hopefully not for a long time.

Apr 8, 2023 | 07:19 PM

#42

JohnnyRay

Racer

Joined: Feb 2023

Posts: 345

Likes: 93

Quote:

Originally Posted by OUTAKTRL

I’ve been searching for a new Agm battery. Anyone have any suggestions ? Thx

I went with an AC Delco group 34 AGM for my 65 through Summit Racing recently. Delivered to my door with no shipping charge for about $165. And no core required. I have purchased 3 for various vehicles so far - all with good results. No doubt they have the correct group size for your car as well...

Last edited by JohnnyRay; Apr 8, 2023 at 07:24 PM.

Apr 9, 2023 | 09:03 AM

#43

drTim

Intermediate

Joined: Jun 2017

Posts: 42

Likes: 12

From: Mobile Alabama

I recently bought An Optima "Red Top" , based on this forum recommendations. I'll keep the "Yellow Top" battery in mind if I have problems with this one. So far, it's a great battery as advertised. Time will tell. Thanks for the info.

Apr 9, 2023 | 10:57 AM

#44

JohnnyRay

Racer

Joined: Feb 2023

Posts: 345

Likes: 93

I had an Optima Red Top in my Superformance Cobra that may have been 15 years old when it finally failed. That's a lot of service! When it did go, it was sudden...and I have heard that to be true about them. I didn't buy another though (went with an AC Delco instead) as I was not convinced of the value...or that another would provide as much service.

I think a lot of battery longevity is the result of regular use of a premium battery maintainer. Recently, I replace a traditional lead/acid battery at 12+ year old. Regular care can be beneficial!

Apr 10, 2023 | 10:00 PM

#45

RedC5

Melting Slicks

Joined: Mar 1999

Posts: 3,211

Likes: 167

From: Rochester Hills Michigan

Quote:

Originally Posted by leadfoot4

I don't expect a car battery to last more than 5-6 years. My 2001 C-5 has had Optima "red tops" in it since 2002, when the first round of "leakage scares" occurred, with the OE Delco batteries. Every 5-6 years, I buy a new red top and either put the old one in my "winter beater", or give it to a friend. But FWIW, I've never had an issue with any of the Optimas........

Or - do what I am doing - bought the new Red Top this weekend and the 5 year in car Red Top goes downstairs to the inverter for the sump pump! Great backup!

Apr 11, 2023 | 10:45 AM

#46

CWW99FRC

4th Gear

Joined: Feb 2023

Posts: 4

Likes: 0

Oreillys Super start platinum AGM 78 group size

Jun 26, 2023 | 12:54 PM

#47

JHrinsin

Drifting

Joined: Sep 2017

Posts: 1,962

Likes: 694

From: Avon Lake OH

Quote:

Originally Posted by JHrinsin

...with a 62 Ahr rating as well. That is very nice battery, but somewhat expensive too.

Not sure of the year that the OP has, but a 1997-03 can use a group 78 side post AGM battery.

1997-00 came from the factory with Group 78 wet cell battery (can be upgraded to Group 78 AGM)
2001-03 came from the factory with Group 75 AGM battery (can be upgraded to Group 78 AGM)
2004 came with a top post Group 86 ~~AGM~~ wet cell battery (same size as Group 75) (but it can be upgraded to a Group 34 AGM)

Group 78 battery is 10-1/4" L x 7-1/16" W x 7-5/16" H
Group 75/86 battery is 9-1/16" L x 7-1/16" W x 7-5/16" H
Group 34 battery is 10-1/4" L x 6-13/16" W x 7-7/8" H

It has been pointed out to me concerning the 2004 battery was OEM (now after suppressions) p/n 88865255 (86PS) with according to the GM TechLink sheet notes this as being a "flooded" battery and NOT (I am very surprised) an AGM battery. I would still recommend upgrading to the AGM battery to protect the wiring harness and ECM, that is unless your are trying to stay as close as possible to 100% true factory original.