[jamsomito]

My battery is original in my 2016 Ody SE, so almost 8 years old. It died on me a couple times last summer in my driveway for some hours-long deep cleanings (accessory power). Since then I have kept jumper cables in the trunk, and I just needed them a week ago after sitting on a conference call in a parking lot for 45 mins. I realized when the infotainment screen flickered that I was in trouble... Looked around and I had left the fan running on low.

Anyways, I want a battery with the best reserve capacity. I'm interested in an AGM battery. We use the DVD player, onboard vacuum, power a camper trailer 12v fridge when on the road, and I frequently work from the car. From my searches, it looks like the Odyssey Extreme batteries win in this category. I can get a size 24F for about $350 locally. https://www.autozone.com/batteries-...odp-agm24f-group-size-24f-840-cca/1049457_0_0

Only problem is my current battery is a 24R (pic at bottom), which is the same size but with reversed terminals. I could just put the battery in backwards, but my cables are too short. Would it be ill-advised to get a red and black extension to make this battery work?

If the extensions aren't a good idea, can anyone recommend me the next best AGM battery for reserve capacity? As long as it's under $400 I don't really care about cost. This will likely be the last battery I buy for this vehicle.

Thanks for any thoughts.

 

[jamsomito]

Lol. Yes, it's a US SE. 2016. I don't think the RES was available in the EX either, but otherwise nailed it. I like to think of it as half way from EX to EX-L.

Anyway, yes I have done a search and what I found is the general majority like Walmart batteries. Or essentially anything with a 3+ year warranty. I also found that AGM is compatible with any of these vans. Not sure where the majority saying it won't work came from? The search also turned up relatively few results in the '11-'17 forum. These forum search tools are generally awful though, so I blame that

 

[jamsomito]

Search results for query: AGM

www.odyclub.com

Only 11 pages worth restricted to only this forum.

AGM vs Conventional ("maintenance free")...

I tried to replace my batteries at Costco but found out (1) Costco requires AGM batteries to be installed on Ody's and (2) the Costco near me had been out of stock on size 24F AGM's the entire Pandemic even though they have plenty of standard 24Fs. From my research AGMs experience short lives...

www.odyclub.com

Thank you for trying to help, I am appreciative of that. But this is not helpful. I've spent half an hour now going through 7 of these 11 "pages" of results (which are really multiple "results" per thread for probably only 2 pages of threads if listed the same way). Like I said I've already done a search. Some of these exact threads came up before. I did not find answers to my questions, which is why I'm posting now. I'm not saying the answer isn't there, I just can't find it if it is.

To clarify:

I am NOT asking for troubleshooting why my car won't start, or has low voltage, or won't charge.

I am NOT asking if I need a new battery or not. I just gave some background, which perhaps I should have left off to avoid confusion. I decided I want to buy a new one to try.

I am NOT asking if I should get an AGM battery or FLA battery. The community seems split in this, but there are many recommendations for AGM! I'd like to try it.

I just want to know:

1) are battery lead extensions a bad idea if I get a 24F battery and I need to connect on the front side instead of the back side like they are now? (I did see a post claiming 24F works and it's the same as 24R, but a Google search disagrees with this saying the F means flat top and R means reversed terminals)

And 2) what are some of the AGM batteries with biggest reserve capacity? This is the parameter I am most interested in. Nobody seems to list them by this metric on a Google search so unless I record the specs of every battery and sort myself there's not a great way to know this. I figured somebody else would have tried to find one for the same reasons which is why I'm asking. But if not then I'll have to continue searching in my own, and no worries there. Although at this point I probably could have had my answer already if I hadn't asked.

Sorry to annoy anyone with my questions. Thanks to anyone who cares to share some specific insight.

 

[jamsomito]

So it looks like the 24F does indeed have reversed terminals. If this is true then I won't need the extensions.

 

[jamsomito]

Interesting that you say Reserve Capacity is your primary criterion, but link to a battery that does not give the spec...nor do you.

Check Rock Auto for the correct size AGM, and compare the specs with your secret number.

The link most certainly does list the reserve capacity. I said based on my research, this is what I found is best. Do you know a better one? I'm all ears if someone has better info. The Odyssey has a 155 min reserve capacity. I couldn't find better. The van takes a 24R or 35 group size battery.

 

[jamsomito]

Well folks, I waffled too long on this. I couldn't find clear info on whether the AGM was actually advisable over just anecdotal evidence of having no issues. I'm leaning more and more towards it being okay, but it's too late now.

My wife loaded up the kids and their school stuff and their snow gear and her 15 bags and coffee and breakfasts, tried to start it up and only clicks. So I got a frantic text and came help her move everything over to our other car. I bummed a ride to the closest auto parts store which happened to be Advance Auto Parts. They stock Die Hard batteries which also have a decent reputation. At the time I wasn't completely sold on AGM so I just went with the longest warrantied flooded lead acid Die Hard battery (Platinum). It still has a reserve capacity of 130 minutes, which I thought was pretty good. It's better than the Die Hard Platinum AGM too, which was 120min I believe.

Surely there was a better deal to be had around town, but it became a problem that needed a quick fix. I'm comfortable with the quality and warranty (4 years) on this one at least. Happy to be done thinking about it at least

For what it's worth - I can confirm the 24F has reverse terminals. The Die Hards only had 24F, not 24R and I have it in my van now.

Thank you to everyone for the discussion. Still curious if there's a better battery for reserve capacity tho...

 

[jamsomito]

deleted - duplicate post, sorry.

 

[jamsomito]

Wow. So, you paid almost double (compared to an Everstart Maxx), got 1 year extra warranty for that and got 10 fewer mins in reserve capacity. Awesome.

Classic case of analysis paralysis.

As you say, too late now so no point in crying over spilt milk.

The everstart is also 130min reserve capacity. It wasn't an option when I needed it. Sorry to have offended you by explaining my situation.