Battery question
Jun 17, 2023 | 11:42 AM
Thread Starter
Heel & Toe
Joined: Feb 2021
Posts: 22
Likes: 1
Battery question
I have a 02 and the stock battery size is a 75 will a 78 fit with no problems it is hard to find a 75 agm battery the last one I got was from Sams club but they don’t carry that size anymore but they still carry the agm 78
thanks
Jun 17, 2023 | 12:46 PM
Melting Slicks
Joined: Sep 2021
Posts: 2,555
Likes: 1,213
Group 75
Height (in): 7-3/16 Inch
Length (in): 9-11/16 Inch
Width (in): 7-5/8 Inch
Group 78
Height (in): 7-1/4 Inch
Length (in): 10-3/4 Inch
Width (in): 6-7/8 Inch
These are from two batteries at O'Reilly. I'd get out to the car and do some measuring.
Jun 17, 2023 | 12:47 PM
Cruising
Joined: Oct 2017
Posts: 10
Likes: 7
From: West Central Florida
Just put a red top Optima 78 in my 99 and it fits fine.
Jun 17, 2023 | 06:27 PM
Thread Starter
Heel & Toe
Joined: Feb 2021
Posts: 22
Likes: 1
I didn’t know if the earlier C5s that used a 78 battery had a different battery box than the later c5s that used a 75 battery
Jun 17, 2023 | 07:47 PM
Race Director
Joined: Aug 1999
Posts: 11,115
Likes: 669
From: SE Pennsylvania
St. Jude Donor '03 thru '26
Oldtimer
I put in a Red top in my 03 last January, just like I did with my last C5 and I have never had a problem with a optima so far ?
Jun 17, 2023 | 08:30 PM
Safety Car
Joined: Jan 2019
Posts: 4,308
Likes: 3,455
From: Somewhere, Florida
St. Jude Donor '20-'21-'22-'23-'24
78 fits just fine. I have a 34/78 dual terminal in mine for my stereo system. Zero issues.
Jun 17, 2023 | 09:12 PM
Le Mans Master
Joined: Feb 2021
Posts: 6,442
Likes: 4,278
From: Florida
2025 Corvette of the Year Finalist - Unmodified
2024 C5 of the Year Winner- Unmodified
2022 C5 of the Year Finalist - Unmodified
This will fit your tray. It’s a tiny bit larger than stock, but fits fine. Only thing I had to do was grind the rubber hold down a little bit. No biggie. Just make sure to get the correct post configuration.
Advanced Auto purchased DieHard a couple years ago, so you can find them at all their stores.
Jun 18, 2023 | 12:10 AM
Joined: Mar 2001
Posts: 367,763
Likes: 24,683
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
The DieHard Platinum AGM is a very good battery - I ran one in my 2003 and never had a problem.
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Jun 18, 2023 | 08:53 PM
Joined: Nov 2003
Posts: 24,705
Likes: 4,549
From: Bugs Bunny should'a made a left turn here
Jun 19, 2023 | 06:11 AM
Melting Slicks
Joined: Mar 2023
Posts: 2,896
Likes: 1,657
From: North Coast
Just lost a Die hard long before it’s time.
Jun 19, 2023 | 08:48 AM
Burning Brakes
Joined: Aug 2012
Posts: 1,090
Likes: 82
From: NYC
I just bought a AGM Duracell group 78 from Sams club a month ago. Perfect fit and great price. Even got it with a discount.
Jun 19, 2023 | 08:58 AM
Melting Slicks
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
Quote:
Originally Posted by
Vetteman Jack
The DieHard Platinum AGM is a very good battery - I ran one in my 2003 and never had a problem.
That would have been one of the original Sears Platinums, aka Odyssey Extremes. I had one in for literally many years - about 12-13 yrs IIRC.
The new ones are from a different supplier and have a slightly different spec.
Jun 23, 2023 | 09:19 AM
Burning Brakes
Joined: Aug 2004
Posts: 1,174
Likes: 125
From: Dunstable MA
St. Jude Donor '05
I got a size 78 Duracell AGM at Sammie's last month. Fit like a glove.
This follows going through two Optima Red Tops in five years, so the 3 year replacement warranty looked good.