Batteries AGM vs Acid
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=51337
Printed Date: January-29-2025 at 10:57pm
Topic: Batteries AGM vs Acid
Posted By: gun-driver
Subject: Batteries AGM vs Acid
Date Posted: August-27-2023 at 9:34am
|
So I just got my Sport out of storage (yea a little late but better late than never) and while it was in storage I robbed the battery out of it for my 6.0 Super Duty (same batteries) So I was shopping for a new battery and saw that interstate now makes an AGM Group 65 for about 60 bucks more, $120 vs $183 I see that the CCA of the AGM is a little lower as is the CA and the RC but doesn't state the AH of the 65N. So I'm wondering in a warm environment like the ski boat (where CCA isn't quite as important) are the benefits of the AMG worth the extra coin? I'm thinking not, just wondering what others that may be more astute on these things think. Regular 65N specs.
|
Replies:
Posted By: KENO
Date Posted: August-27-2023 at 12:56pm
|
I'm thinkin" like you're thinkin" ...... lead acid. I have to go see what astute means now
 |
Posted By: MourningWood
Date Posted: August-27-2023 at 2:38pm
|
I have been using Odyssey PC925 AGM batteries since 2004 in 2 vintage race cars (525 h.p Ford small blocks) a LeMons car (400 h.p Ford small block), a '94 Ski Nautique and a '64 Dunphy. They are small, compact, light weight (@26#) and have never failed.....so far
------------- 1964 Dunphy X-55 "One 'N Dun" 'I measured twice, cut three times, and it's still too short!" |
Posted By: Gary S
Date Posted: August-27-2023 at 4:46pm
|
With the Mustang I always cycled my car battery to the boat every few years. Always worked well until the year I shorted out a plate and got stuck at a GL reunion in '12. Started buying Optima's after JoeinNY came to my rescue and he was using them. Added 2 more to the fleet but that original one is still going. All the newer european cars have them in now as well,just changed out my cars 8 year old one. No matter what battery's I have I do keep them on maintainers when not in use ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: Tomrupp
Date Posted: August-27-2023 at 5:35pm
|
I like the cheapest group 65 I can find. Typically at my big box store starting with a W. They last 3-5 years for me. No trouble cranking the 351. I can’t make sense of the designer battery prices. ------------- Tom 94 Ski Nautique Open Bow 351 with Carb 95 Double Decker Aqua Patio with 50hp Honda (3 carbs). |
Posted By: gun-driver
Date Posted: August-27-2023 at 6:53pm
I have been running Walmart group 65N's in all my boats along with the double battery setup in my 6.0 Superduty, I never had an issue with them even in Canada @ -30c Found this in my research, Johnson Controls supplies more than one third of the world's lead-acid batteries to automakers and aftermarket retailers including Wal-Mart, Sears, Toyota, and BMW. Lead acid battery brands produced under this business unit include Continental, OPTIMA, Heliar, LTH, Delkor and VARTA automotive batteries. Hence my original question, Is the AGM worth the extra coin?? |
Tomrupp wrote:Posted By: 67 ski nat
Date Posted: August-27-2023 at 9:21pm
|
Both types are useful I like using AGM type in my dirt bikes, and off-road stuff. Better vibrations resistant sealed etc But if I had a really dependable running old school car or boat, nothing wrong with the WM I am using an optima red top in my boat now just for insurance, original starter loves it. |
Posted By: Gary S
Date Posted: August-27-2023 at 10:39pm
I would gladly pay double for one just not to be in Canada when it's -30  ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: fanofccfan
Date Posted: August-28-2023 at 8:37am
|
My 2004 came with a walmart group 65 that was two years old in 2012. Knock on wood but it is still cranking years later. That is one battery out of many in the fleet with that type of age as others are not so great. Big Red must vibrate way too much as that is usually a every year change but that isnt the worst thing as they usually are still under full replacement warranty. ------------- 2004 196 LE Ski 1969 Marauder 19 1978 Ski |
Posted By: KENO
Date Posted: September-02-2023 at 7:42am
|
So.........you buy a battery yet? Maybe forget to update the thread?
|
Posted By: MrMcD
Date Posted: September-02-2023 at 5:22pm
|
Johnson controls does build batteries here in the USA. They built batteries for my company for several years. We branded them as Champion because we owned Champion Spark Plugs and could use the name at no charge. There were two more large builders, Decca and I forget the other. Today you have competition from Korea, Mexico and China bring in batteries so do you homework. I am several years removed from the company so I do not know if Johnson even builds the Champion brand today but I did respect the product. AGM batteries have the ability to take a much faster recharge, you can charge them at 60 AMPs and they like it, our boats typically do not put out the AMPs to do this fast recharge so you give up one of its abilities. Standard batteries prefer a slow charge if you want them to last. They also have the ability to provide full voltage right up to the point where they fail. Standard batteries tend to get weaker as they discharge. So with a standard battery you know when they are getting weak while with an AGM it will start at full power and maybe on the next start be full dead. So far less warning signs. Not so good in a boat. So the types each have advantages and dis advantages choose which you prefer. I asked the battery engineer on staff why I was getting short life from my boat battery, he asked how big a battery I was using, I replied the largest I could fit. He laughed at me. Said the larger and heavier batteries squeaze larger leaded plates inside to hold the extra charge. Because they are larger they are closer together in the box. This allows they to touch in the vibration they get in a boat causing failure. He said put in a lighter duty battery and it will last longer. So I went from 900 AMPs to 600 and it lasts much longer and cost less.
------------- |
Posted By: gun-driver
Date Posted: September-02-2023 at 10:38pm
Didn’t think it was the kind of thread that needed closure. Yes I bought a new battery, I bought the standard group 65 Interstate.
|
Posted By: KENO
Date Posted: September-03-2023 at 4:25pm
|
Well you did ask the question twice and got a handful of answers, so why not have some closure?
|