AGM Batteries.......
Drifting
Joined: Apr 2005
Posts: 1,461
Likes: 378
From: Bellinum Wa
A word caution to those using AGM batteries. Especially since Corvettes sit a lot; an AGM battery that's gone down won't re charge like a regular battery.
To allow an AGM to build up if it sits for a while the only way to recharge an AGM battery is to charge it with another known good battery in parallel. Slow, once it gets past 10.5 volts at a low amperage, you can then charge it on its own. It would be smart(er) to buy a battery charger capable of at least 30 amps that has an AGM mode built into the charger as AGM's actually like being slightly overcharged
To allow an AGM to build up if it sits for a while the only way to recharge an AGM battery is to charge it with another known good battery in parallel. Slow, once it gets past 10.5 volts at a low amperage, you can then charge it on its own. It would be smart(er) to buy a battery charger capable of at least 30 amps that has an AGM mode built into the charger as AGM's actually like being slightly overcharged
Thread Starter
Le Mans Master
Joined: Feb 2012
Posts: 5,634
Likes: 537
From: SE Pa
interesting, 5 years is not a good showing IMO. I had a 'red Top' years ago in my race car and was not impressed. A lot of guys I raced with had better luck with the Yellow top
Le Mans Master
Joined: Aug 2005
Posts: 7,392
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From: Merritt Island, FL
Thread Starter
Le Mans Master
Joined: Feb 2012
Posts: 5,634
Likes: 537
From: SE Pa
A word caution to those using AGM batteries. Especially since Corvettes sit a lot; an AGM battery that's gone down won't re charge like a regular battery.
To allow an AGM to build up if it sits for a while the only way to recharge an AGM battery is to charge it with another known good battery in parallel. Slow, once it gets past 10.5 volts at a low amperage, you can then charge it on its own. It would be smart(er) to buy a battery charger capable of at least 30 amps that has an AGM mode built into the charger as AGM's actually like being slightly overcharged
To allow an AGM to build up if it sits for a while the only way to recharge an AGM battery is to charge it with another known good battery in parallel. Slow, once it gets past 10.5 volts at a low amperage, you can then charge it on its own. It would be smart(er) to buy a battery charger capable of at least 30 amps that has an AGM mode built into the charger as AGM's actually like being slightly overcharged
Thread Starter
Le Mans Master
Joined: Feb 2012
Posts: 5,634
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From: SE Pa
Safety Car
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From: Somewhere, Florida
St. Jude Donor '20-'21-'22-'23-'24
Melting Slicks
Joined: Jun 2013
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From: West Virginia
"Best" AGM? Probably the original Sears Platinum. Last forever - mine is now 13 years old, holds a charge for weeks on end with no issues. They were Odyssey Extremes rebranded for Sears. The "current" Sears Platinum is from a different supplier, Johnson Controls, I believe. The only problem with Odyssey batteries is that they are very pricey. Even back when I bought my Platinum, it was $200. I believe the same battery now from Odyssey is more like $300.
The "best" is never cheap.
As an aside, the "best of the rest", i.e. wet cell batteries, in my experience at the moment are the Everstart Maxx from Walmart. They last well - I have one I bought a good few years ago in my truck and it always starts on the button and we had another "keeper" in our Turbo Subie. Wish I could get one to fit my generator - that thing is on its 5th battery in 13 years - 2 Diehards, 1 Autocraft and 2 Interstates. Trouble is it's an odd size and choice is limited
The "best" is never cheap.
As an aside, the "best of the rest", i.e. wet cell batteries, in my experience at the moment are the Everstart Maxx from Walmart. They last well - I have one I bought a good few years ago in my truck and it always starts on the button and we had another "keeper" in our Turbo Subie. Wish I could get one to fit my generator - that thing is on its 5th battery in 13 years - 2 Diehards, 1 Autocraft and 2 Interstates. Trouble is it's an odd size and choice is limited
Last edited by jackthelad; Oct 4, 2021 at 02:15 PM.
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Thread Starter
Le Mans Master
Joined: Feb 2012
Posts: 5,634
Likes: 537
From: SE Pa
"Best" AGM? Probably the original Sears Platinum. Last forever - mine is now 13 years old, holds a charge for weeks on end with no issues. They were Odyssey Extremes rebranded for Sears. The "current" Sears Platinum is from a different supplier, Johnson Controls, I believe. The only problem with Odyssey batteries is that they are very pricey. Even back when I bought my Platinum, it was $200. I believe the same battery now from Odyssey is more like $300.
The "best" is never cheap.
The "best" is never cheap.
Drifting
Joined: Apr 2005
Posts: 1,461
Likes: 378
From: Bellinum Wa
Quote "Originally Posted by jackthelad View Post
"Best" AGM? Probably the original Sears Platinum. Last forevermine is now 13 years old, holds a charge for weeks on end with no issues. They were Odyssey Extremes rebranded for Sears. The "current" Sears Platinum is from a different supplier, Johnson Controls, I believe.But who makes DieHard batteries?"
Well, many people are confused about the owner and manufacturer of the popular DieHard batteries. DieHard car battery brand is owned by Advance Auto Parts which is an American automotive aftermarket parts provider. Advance Auto Parts bought the DieHard battery brand from Sears in late 2019 for $200 million.
Johnson Controls Sells Optima which has New Owners as well
Brookfield Business Partners for $13.2 billion
Rebranded Johnson Controls ( who was the Owner of Optima) as;
Clarios
https://www.clarios.com/
Clarios
https://cleantechnica.com/2019/05/06...cle-batteries/
"Best" AGM? Probably the original Sears Platinum. Last forevermine is now 13 years old, holds a charge for weeks on end with no issues. They were Odyssey Extremes rebranded for Sears. The "current" Sears Platinum is from a different supplier, Johnson Controls, I believe.But who makes DieHard batteries?"
Well, many people are confused about the owner and manufacturer of the popular DieHard batteries. DieHard car battery brand is owned by Advance Auto Parts which is an American automotive aftermarket parts provider. Advance Auto Parts bought the DieHard battery brand from Sears in late 2019 for $200 million.
Johnson Controls Sells Optima which has New Owners as well
Brookfield Business Partners for $13.2 billion
Rebranded Johnson Controls ( who was the Owner of Optima) as;
Clarios
https://www.clarios.com/
Clarios
https://cleantechnica.com/2019/05/06...cle-batteries/
Last edited by Hary Gahtoe; Oct 4, 2021 at 09:47 PM.
Thread Starter
Le Mans Master
Joined: Feb 2012
Posts: 5,634
Likes: 537
From: SE Pa
Quote "Originally Posted by jackthelad View Post
"Best" AGM? Probably the original Sears Platinum. Last forevermine is now 13 years old, holds a charge for weeks on end with no issues. They were Odyssey Extremes rebranded for Sears. The "current" Sears Platinum is from a different supplier, Johnson Controls, I believe.But who makes DieHard batteries?"
Well, many people are confused about the owner and manufacturer of the popular DieHard batteries. DieHard car battery brand is owned by Advance Auto Parts which is an American automotive aftermarket parts provider. Advance Auto Parts bought the DieHard battery brand from Sears in late 2019 for $200 million.
Johnson Controls Sells Optima which has New Owners as well
Brookfield Business Partners for $13.2 billion
Rebranded Johnson Controls ( who was the Owner of Optima) as;
Clarios
https://www.clarios.com/
Clarios
https://cleantechnica.com/2019/05/06...cle-batteries/
"Best" AGM? Probably the original Sears Platinum. Last forevermine is now 13 years old, holds a charge for weeks on end with no issues. They were Odyssey Extremes rebranded for Sears. The "current" Sears Platinum is from a different supplier, Johnson Controls, I believe.But who makes DieHard batteries?"
Well, many people are confused about the owner and manufacturer of the popular DieHard batteries. DieHard car battery brand is owned by Advance Auto Parts which is an American automotive aftermarket parts provider. Advance Auto Parts bought the DieHard battery brand from Sears in late 2019 for $200 million.
Johnson Controls Sells Optima which has New Owners as well
Brookfield Business Partners for $13.2 billion
Rebranded Johnson Controls ( who was the Owner of Optima) as;
Clarios
https://www.clarios.com/
Clarios
https://cleantechnica.com/2019/05/06...cle-batteries/
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,666
.....Last edited by grinder11; Oct 5, 2021 at 09:10 AM.
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,666
Quote "Originally Posted by jackthelad View Post
"Best" AGM? Probably the original Sears Platinum. Last forevermine is now 13 years old, holds a charge for weeks on end with no issues. They were Odyssey Extremes rebranded for Sears. The "current" Sears Platinum is from a different supplier, Johnson Controls, I believe.But who makes DieHard batteries?"
Well, many people are confused about the owner and manufacturer of the popular DieHard batteries. DieHard car battery brand is owned by Advance Auto Parts which is an American automotive aftermarket parts provider. Advance Auto Parts bought the DieHard battery brand from Sears in late 2019 for $200 million.
Johnson Controls Sells Optima which has New Owners as well
Brookfield Business Partners for $13.2 billion
Rebranded Johnson Controls ( who was the Owner of Optima) as;
Clarios
https://www.clarios.com/
Clarios
https://cleantechnica.com/2019/05/06...cle-batteries/
"Best" AGM? Probably the original Sears Platinum. Last forevermine is now 13 years old, holds a charge for weeks on end with no issues. They were Odyssey Extremes rebranded for Sears. The "current" Sears Platinum is from a different supplier, Johnson Controls, I believe.But who makes DieHard batteries?"
Well, many people are confused about the owner and manufacturer of the popular DieHard batteries. DieHard car battery brand is owned by Advance Auto Parts which is an American automotive aftermarket parts provider. Advance Auto Parts bought the DieHard battery brand from Sears in late 2019 for $200 million.
Johnson Controls Sells Optima which has New Owners as well
Brookfield Business Partners for $13.2 billion
Rebranded Johnson Controls ( who was the Owner of Optima) as;
Clarios
https://www.clarios.com/
Clarios
https://cleantechnica.com/2019/05/06...cle-batteries/
Racer
Joined: Mar 2021
Posts: 255
Likes: 72
From: Maryland
I used to work at Ferrari of Dallas, Odyssey batteries are what we put in older Ferraris that didn't qualify for factory warranty replacements. IIRC, the F430 Scuderia can only take an Odyssey due to it being a bizarre group size compared to the standard F430.
I currently have a Red Top and not too impressed with it, I think I got a bad/old one from Advance Auto...considering getting an Odyssey direct from them.
I don't think the employees at some of these box stores check their more expensive batteries and since no one is buying them as often...my guess is they discharge pretty quick
Anyone hear anything about Deka? I recall them having a good rep but I dunno if they make AGMs...
I currently have a Red Top and not too impressed with it, I think I got a bad/old one from Advance Auto...considering getting an Odyssey direct from them.
I don't think the employees at some of these box stores check their more expensive batteries and since no one is buying them as often...my guess is they discharge pretty quick
Anyone hear anything about Deka? I recall them having a good rep but I dunno if they make AGMs...
Last edited by SkyTigress; Oct 5, 2021 at 09:19 AM.
Melting Slicks
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From: East Windsor NJ
Thread Starter
Le Mans Master
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From: SE Pa
Race Director
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From: Iowa
St. Jude Donor '03 thru '26
I've heard Interstate is/was the largest manufacturer. They used to be made in the U.S.A. (like most things). Don't know if that is still true, or not. I personally like Gel batteries. Had one on a snowmobile, which places a huge demand on a battery. But I've never had an AGM battery. I was surprised to read that GM has returned to top post batteries. Lionelhutz (Peter) has a post somewhere about some side post battery terminals not having sufficiently deep female threads, and there are cases of some guys tightening their battery cables, but the bolts bottom out BEFORE a decent contact is made with the cable. He advised everyone with side post batteries to try moving/twisting the actual cable after its tightened, because the bolt may be tight (actually bottomed out!), but the cable(s) aren't sufficiently tightened!! I am old enough to remember the problems with a top post. Until I bought my C5, I NEVER had a problem with a side post battery. I suspect the design is sound. The variable quality must be due to lack of manufacturing quality control, and/or country of origin. Is there an AGM/Gel battery made with side posts? I think I saw an Optima that had both top AND side mounting, but I'm not sure......
.....
Safety Car
Joined: Oct 2007
Posts: 4,206
Likes: 1,075
From: South Florida
I bought a $38 AGM battery from a company called "mighty maxx" On ebay,
it was very small, less than half the size of a typical car battery.
I bought it in 2017 as a temporary battery to see if it would even be able to crank over the 5.3L engine in my car...
Well, I am still using it to this day. Its pretty amazing. Cranks over 5.3L Like nothing at 9:1 compression on the 20 year old starter.
it was very small, less than half the size of a typical car battery.
I bought it in 2017 as a temporary battery to see if it would even be able to crank over the 5.3L engine in my car...
Well, I am still using it to this day. Its pretty amazing. Cranks over 5.3L Like nothing at 9:1 compression on the 20 year old starter.
