Battery Upgrade to Group 24F?

[bmninada]

It's getting cold and my battery gave me issues. Costco is nearby and coincidentally the guy there said he happens to have the same car as me. i.e. CX5 GT 2016. He said why not put group 24F and stressed on "F". It easily fits in the cavity where the group 35 goes and maybe I might need to saw off a small portion.

Below are the details - differences. Has anyone upgraded to G 24F ? Love to hear about it.

Also, do I need to have the vehicle's computer programmed or "registered" with the new battery's capacity and technology?

Failing to do this might cause the car to charge the new high-capacity AGM battery using the charging profile intended for the older, smaller battery, which can lead to premature failure? For AGM batteries its not really that big of an issue?

Length is the only difference: 9.1 vs 10.25 inches. But CCA, RC, Amps are significantly more in 24F. I checked (measured) the terminals are the same.

 

[GFrosty]

I have considered much the same thing.

2016.5 CX-5 GT, here. Currently have an Optima RedTop Group 35. But have been mulling over the specs and size differences of the Optima YellowTop Group 48. It's a smidgeon wider, and 1.5" longer. But if the tray can accommodate it, the performance specs are notably improved.

• Group 35 sized Optima RedTop -- 720 CCA; 44aH; 90min reserve; 32 lbs; 9.38"L x 6.75"W x 7.69"H
• Group 48 sized Optima Yellowtop DH6 -- 800 CCA; 72aH; 140min reserve; 54 lbs; 10.95"L x 6.9"W x 7.5"H. Has 11% more CCA, 63% more aH, and 50% more reserve. But there's that 10.95" length to cope with.

Haven't taken it any further than that. Next year, I might break out the measuring tape to see what impact on the tray and space a pudgier Group 48 would make.

 

[bmninada]

I have considered much the same thing.

2016.5 CX-5 GT, here. Currently have an Optima RedTop Group 35. But have been mulling over the specs and size differences of the Optima YellowTop Group 48. It's a smidgeon wider, and 1.5" longer. But if the tray can accommodate it, the performance specs are notably improved.

• Group 35 sized Optima RedTop -- 720 CCA; 44aH; 90min reserve; 32 lbs; 9.38"L x 6.75"W x 7.69"H
• Group 48 sized Optima Yellowtop DH6 -- 800 CCA; 72aH; 140min reserve; 54 lbs; 10.95"L x 6.9"W x 7.5"H. Has 11% more CCA, 63% more aH, and 50% more reserve. But there's that 10.95" length to cope with.

Haven't taken it any further than that. Next year, I might break out the measuring tape to see what impact on the tray and space a pudgier Group 48 would make.

I haven't done Optima but did Interstate (Costco). It fit perfectly. No cutting, etc. Even terminals fit. My issue is: The new high-capacity AGM battery using the charging profile intended for the older, smaller battery, which can lead to premature failure? OR: for AGM batteries its not really that big of an issue? Somewhere here I am reading CX5 comes with non-AGM batteries and the charging profile is built accordingly. So there's a possibility of a double whammy - i.e not only moving to AGM might be an issue and then on top a different battery group. I am debating on this.

 

[N7turbo]

I highly doubt the battery capacity is an issue. The battery will charge at the same voltage. Also, battery capacity reduces over its lifespan so that is not a fixed figure. The computer knows the battery capacity or health based on resistance to charging.

 

[cz5gt]

I have two deep cycle AGMs (Northstar) on my cars and no issues with charging. They just work.
only problems (with any battery) is short drives where the car cannot fully charge the battery.

 

[sm1ke]

Good timing. On my 2022 CX-9, I replaced the Group 35 with a Group 24F AGM battery this past weekend. I had done the same thing with my prior 2018 CX-9. You just remove the Group 35 battery, remove three 12mm bolts securing the battery tray, then cut out the two tabs at the "front" of the tray. This leaves just enough space to fit the length of the Group 24F.

Post in thread 'What have you done to your CX-9 today?'

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• sm1ke

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