Odyssey vs ACDelco AGM battery for '23 Outback

[RitcheyRch]

I got 2 from them. One was older, but I emailed Odyssey and they replaced it. The second one was new.

I had the same issue and the older one wasnt taking a charge. Called NAPA and they sent out another one that was much newer.

 

[MrkofXcellence]

Not sure why one would need such a battery for a Subaru. Seems like requirements creep…

Is the alternator set up for agm charging profile? If not, it will still work, I’ve done it, but it’s not ideal.

What is the Subaru cranking requirements? I doubt particularly high…

23 Subaru has auto start/stop. Need either AGM or enhanced flooded. Enhanced flooded is hard to find.

 

[Donald]

We started our Kubota and a Sprinter van as a test at -22 F. Made sure we got winter diesel, and used an additive if needed.

At -22F I would be worried about me starting.

 

[RcClockman]

I get 7-8 years out of an Odessey..

 

[JHZR2]

23 Subaru has auto start/stop. Need either AGM or enhanced flooded. Enhanced flooded is hard to find.

If it is mandated in the manual, so be it. And the alternator should be set up to regulate voltage appropriately.

 

[Ranger83]

OP lives in Northern Michigan.

Our place in NH get down to -20’s F and the UP is very likely colder. International Falls is cold as hell.

We buy Odyssey AGM’s for most of our vehicles, including 05 and 08 Outback 3.0R. We use OEM Toyota for a Gen 3 Prius, it is a small AGM in the trunk.

Older Subarus don’t seem to have a problem charging them. They are plain ole “dumb” systems.

Older Subarus do not have “smart” charging systems so wondered if the charge voltage on our Outbacks would be sufficient. Kind of late to that party since we’ve been using AGM for 10 years….

Plugged a voltmeter into a 12V plug. It hit 14.8V at first start, dropped to 14.3 over the next few minutes.

Odyssey owner’s manual states they require 14.7V to charge fully. 12.84V at battery is fully charged.

 

[UncleDave]

The odyssey - if you have the dough.

I'm pretty sure if you check it will also weigh more than the other two by a bit.

Rip the top off the two and you'll find the plates on the odyssey are thinner and use more interior space of the case they'll this TPPL (thin plate pure lead)

The odyssey in my titan is 16 years old now, and only ever got an AGM charge profile randomly when I used the odd maintainer that had that.
90% of the time it gets maintained at 14.3 on a non AGM Optimate 6.

I have killed them through mistakes and the new ones are the same weight as the older ones.