Battery questions

2157 Views 37 Replies 18 Participants Last post by jdm06ody, 3 mo ago

jamsomito

Discussion Starter · 3 mo ago

2

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.

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dvpatel

· #2 · 3 mo ago

I am afraid to ask but have you gone over the prior discussions on this?

If your Ody came with a non-AGM battery, there is a fairly vocal contingent who will say stay with the flooded battery as the AGM ones tax the charging system.

Bottomline is, battery discussions are VERY common on here and we do not need to keep rehashing the same stuff repeatedly so I would recommend you search and read most of the prior discussions.

Also. IIRC, the Ody was never sold in the SE trim in the US. Is your Ody Canadian?

Reactions: 2

jiantao

· #3 · 3 mo ago

dvpatel said:
I am afraid to ask but have you gone over the prior discussions on this?

If your Ody came with a non-AGM battery, there is a fairly vocal contingent who will say stay with the flooded battery as the AGM ones tax the charging system.

Bottomline is, battery discussions are VERY common on here and we do not need to keep rehashing the same stuff repeatedly so I would recommend you search and read most of the prior discussions.

Also. IIRC, the Ody was never sold in the SE trim in the US. Is your Ody Canadian?

The SE was around for 2016-2017, I think. It was essentially an EX with a vacuum.

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dvpatel

· #4 · 3 mo ago

jiantao said:
The SE was around for 2016-2017, I think. It was essentially an EX with a vacuum.

Interesting. Was not aware of that and I have spent half my life on this forum.

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jamsomito

Discussion Starter · #5 · 3 mo ago

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

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dvpatel

· #6 · 3 mo ago

www.odyclub.com

Search results for query: AGM

www.odyclub.com

www.odyclub.com

Only 11 pages worth restricted to only this forum.

www.odyclub.com

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

www.odyclub.com

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dvpatel

· #7 · 3 mo ago

Also. Batteries are batteries. ALL cars have them so almost ALL the discussions are actually relevant at least from the 3rd gen and up.

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white2015

· #8 · 3 mo ago

I would not use any AGM in the ody.
The charging systems are different for the two main battery types.

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jamsomito

Discussion Starter · #9 · 3 mo ago

dvpatel said:
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.

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jamsomito

Discussion Starter · #10 · 3 mo ago

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

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white2015

· #11 · 3 mo ago

Please also note that a conventional battery cannot simply be replaced with an AGM battery. If your vehicle originally had a conventional battery, the vehicle rectifier or regulator design is for a conventional battery, and it could cause an issue with the replaced AGM battery. The opposite way as well.

Taken from yusa battery.com

Reactions: 2

brian3

· #12 · 3 mo ago

I am of the camp that an AGM battery in an odyssey that was not originally equipped with one is fine. I installed one a while back in my 2012 and a 2005 Chrysler to boot. Sure the internal resistance is lower and that may require a slightly higher current intially but the drain on the battery is the same based on the loads, and if it charges quicker that just means it will tapper off quicker and the alternator current will drop faster as well. Overall load amp hour is the same and not dependent on the battery.

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Buffalo4

· #13 · 3 mo ago

Your original battery lasted soooo LONG, why not just use the same?
I have no opinion on an AGM battery besides what I read on the Internet.
My suggestion would be to just replace that battery with a Walmart EverStart Maxx battery. or just with the same brand and model of your original battery.
For the price, I don't think you can go wrong.
I have 'heard' that an AGM battery works just fine in an Odyssey.
At Walmart--EverStart Maxx Platinum AGM 24F battery is listed at $169.84.
EverStart Maxx 24F battery is listed at $119.84.
Buffalo4

Reactions: 2

Ted

· #14 · 3 mo ago

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.

JimB3

· #15 · 3 mo ago

AGM and flooded lead acid are the same chemistry. The only difference is that the AGM has the electrolyte contained in a fiberglass mat (hence the Absorbed Glass Mat acronym). You should be able to swap AGM for flooded lead acid with no issues. As an avid off roader for over 30 years, one of the first things Jeep guys do is swap the flooded lead acid battery for AGM (typically Optima brand) for 2 main reasons: 1) in a rollover, battery acid does not spill everywhere; 2) when winching, the extra reserve capacity of an Optima is hard to beat. Many people actually run dual AGM batteries, all with the stock charging system.

DanaH

· #16 · 3 mo ago

Or third alternative is to install in the back somewhere a 2nd deep-cycle type battery (a house battery) that can be setup to charge from the start battery when engine is running. Better to run that fridge and other non-automotive loads on a house battery than get stranded somewhere ;-). House battery could be either FLA or smaller Li-ion type.

DanaH

Reactions: 1

EOT 4 Life

· #17 · 3 mo ago

I replaced my original battery on my 2015 Odyssey almost 3 years ago with an Autocraft AGM battery, and it's been great. I only paid $160 back then, with a coupon.
2015 Battery Died | Honda Odyssey Forum (odyclub.com)

Reactions: 1

CroMath

· #18 · 3 mo ago (Edited)

white2015 said:
Please also note that a conventional battery cannot simply be replaced with an AGM battery. If your vehicle originally had a conventional battery, the vehicle rectifier or regulator design is for a conventional battery, and it could cause an issue with the replaced AGM battery. The opposite way as well.

Taken from yusa battery.com

Yuasa batteries are for motorcycles and other powersports vehicles with their own electrical system designs, parts, demands and characteristics. They're not talking about passenger vehicle contexts. They don't even produce batteries capable of going into a common passenger vehicle.

There is nothing wrong with changing from FLA to AGM in mass-produced modern passenger vehicles like our vans. There could possibly be some trouble if you try to downgrade from an AGM to FLA but that cannot happen in a gen 4 Odyssey (every single one produced started life with a FLA battery).

jamsomito

Discussion Starter · #19 · 3 mo ago

Ted said:
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.

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jamsomito

Discussion Starter · #20 · 3 mo ago (Edited)

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.

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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...

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