Maverick 12v batteries: Stock→AGM→Sodium

[Joaquin F]

I like that people are finding different batteries for our trucks. Question to anyone who might know. Did Ford send a over the air battery update? My 23 Maverick hybrid was getting deep sleep messages constantly. I had to drive it for 2 weeks to work during that fridgid cold snap we had. My battery did go back into deep sleep mode 2-3 days after I stopped driving it.
I drove my truck about 3 hours total one day and it has been parked for 13 days and it has not went back into sleep mode. I keep checking the app and everything shows good. This is why I aked about a possible OTA update. Anyone else have this happen recently?

That’s a good question. I haven’t seen anything indicating Ford pushed an OTA update related to the 12V battery management on the Maverick hybrids recently.

From what I’ve seen, a lot of the deep sleep behavior tends to come down to state of charge and how the BMS estimates it. When the truck gets a longer drive — like the few hours you mentioned — the DC-DC converter has more time to bring the battery up and the BMS recalculates the state of charge.

Another thing that can happen is a BMS relearn if the truck sits locked and undisturbed for several hours (usually overnight). That can update the SOC estimate as well, which sometimes stops the deep sleep messages for a while.

Since I installed the new battery I’ve been monitoring things with an Ancel BM200, mostly to watch how the Maverick’s DC-DC charging system behaves over time. I’m planning to track resting voltage in the mornings too since that’s usually the best indicator of how the battery is actually doing.

It’ll be interesting to see how these systems behave long term — the Maverick’s charging strategy is definitely a little different from traditional vehicles.

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[Joaquin F]

Wow. Considering all the mods we see people post that involve drilling holes, sticking 3M tape, plugging in connectors, lift/lowering kits, and flashing firmware I'd say bending two metal tabs is one of the least worrisome modifications.

If it's not something you're comfortable with, just move on, no need to try and drag the OP through the mud. Plenty of us are comfortable and capable of this type of modification and appreciate that the OP is taking the time (and money) to share his detailed experience with the rest of us.

I really appreciate you saying that, thank you. I definitely wasn’t trying to impose anything on anyone’s vehicle — just sharing what I tried and documenting the results so people have more information if they’re curious about it. Really appreciate the support.

 

[scottjl]

I really appreciate you saying that, thank you. I definitely wasn’t trying to impose anything on anyone’s vehicle — just sharing what I tried and documenting the results so people have more information if they’re curious about it. Really appreciate the support.

I sincerely appreciate you going through all this and sharing it with us. I've dealt with the dreaded "disabling remote services" for years on my 2023 Hybrid Escape and now with my 2025 Hybrid Maverick. Ford has replaced the battery in the Escape several times, always with a standard lead-acid battery, they've updated firmware, even changed out a module once, but it still happens unless I put it on a tender weekly to top it off. I've gotten the same on the Maverick a handful of times since the cold winter hit here, so I recharge that as well, even though it has an AGM. I'm not ready to swap it out for a sodium, not while I've got warranty and can get them to replace it, but it's nice to know it's an option in the future and one I'll probably pursue. Like you I'll probably go the H5 route because why not? Bending two little tabs isn't going to worry me, not with everything else I've already done.

So thanks again for sharing and don't let the complainers discourage you.

 

[Joaquin F]

Update: First Week of BM200 Data + Maverick Battery Listings

I pulled the first export from the BM200 so I could look at actual numbers instead of just watching the graph in the app. I figured I’d share some early data points for anyone interested in how the Maverick’s DC-DC system is behaving with this battery.

Logging window:
Mar 7, 2026 → Mar 13, 2026

Total data points recorded:
4,532 readings (roughly every ~2 minutes)

Overall voltage range observed

• Lowest recorded voltage: 12.37V
• Highest recorded voltage: 14.87V
• Peak voltage timestamp: Mar 11 at ~11:19 AM

Voltage distribution from the log

Out of the 4,532 readings:

• 13.8–14.2V: 552 readings
• 14.2–14.6V: 3,595 readings
• Above 14.6V: 271 readings

So about 3,866 readings were at or above 14.2V, which is roughly 85% of the dataset.

That lines up with what you’d expect to see while the Maverick’s DC-DC converter is actively charging during operation.

Example voltage points throughout the logged days
Here are a few representative readings from different times of day across the dataset:

March 8	March 9	March 10	March 11	March 12	March 13
~6:00 AM: 14.38V ~8:15 AM: 14.63V ~12:30 PM: 14.41V ~6:10 PM: 14.26V	~6:05 AM: 14.34V ~8:20 AM: 14.58V ~1:40 PM: 14.33V ~7:00 PM: 14.18V	~6:10 AM: 14.17V ~8:10 AM: 14.69V ~12:50 PM: 14.44V ~5:40 PM: 14.28V	~6:05 AM: 14.29V ~8:00 AM: 14.72V ~11:19 AM (peak): 14.87V ~6:30 PM: 14.35V	~6:15 AM: 14.27V ~8:05 AM: 14.61V ~1:15 PM: 14.39V ~7:10 PM: 14.24V	~6:10 AM: 14.01V ~8:00 AM: 14.55V ~12:40 PM: 14.42V ~6:50 PM: 14.30V

Correlation with driving
Looking through the timestamps, the higher voltage spikes generally line up with when the truck is being driven.

For context, I usually leave for work or school around ~8 AM, and later in the day I typically drive again sometime between about 11:30 AM and 1:30 PM depending on the day.

The BM200 logs tend to show the voltage climbing into the 14.5V+ range during those time windows, which lines up with the Maverick’s DC-DC charging behavior while the vehicle is operating. This is consistent with the truck increasing charging voltage when the system is actively replenishing the 12V battery during driving.

Charging system test
The BM200 charging test reported:

• Charging voltage at idle: 13.92V
• Charging voltage at higher RPM: 14.02V
• Ripple voltage: 1 mV
• Overall result: OK

Maverick battery listings now on Ohmmu’s site
Quick update on another point from earlier in the thread. I reached out to Ohmmu about Maverick fitment and they’ve now added several Maverick-specific listings to their website.

For those looking for true drop-in options, they added:

Sodium (H4 size)
https://www.ohmmu.com/product-page/ford-maverick-sodium-12v-battery?ref=MAVTRUCK

Lithium (H4 size)
https://www.ohmmu.com/product-page/ford-maverick-lithium-12v-battery?ref=MAVTRUCK

They also added the Group H5 / 24F sodium version for people doing builds where a slightly larger case is acceptable:

https://www.ohmmu.com/product-page/ford-maverick-group-24f-h5-adventure-series-sodium?ref=MAVTRUCK

That one is more geared toward people doing overlanding / experimental setups who are fine making small adjustments like bending the guide tabs in the tray, which is what I documented earlier in the thread and is noted on their website.

My two cents
My goal with this thread was never really to say “this is the battery everyone should install.”

What I mainly wanted to do was:

• experiment a bit with the Maverick platform
• collect real-world voltage data instead of just spec sheet comparisons
• document how the truck’s DC-DC charging system behaves over time

Even if the biggest takeaway ends up simply being better understanding how the Maverick manages its 12V system, I think that’s still useful information for the community.

I’ll keep logging the BM200 data and will post more updates as the dataset grows.

 

[Joaquin F]

Hi admin; this ^ post contains the latest data and summary for the thread. If possible, would it be helpful to pin it to the first page so new readers can see the updated information? Totally understand if not. Thanks!

 

[ScottyC]

Wow. Considering all the mods we see people post that involve drilling holes, sticking 3M tape, plugging in connectors, lift/lowering kits, and flashing firmware I'd say bending two metal tabs is one of the least worrisome modifications.

If it's not something you're comfortable with, just move on, no need to try and drag the OP through the mud. Plenty of us are comfortable, and capable, of this type of modification and appreciate that the OP is taking the time (and money) to share his detailed experience with the rest of us.

Explain to me anywhere that I dragged the OP through the mud....I'll wait....in fact, I did say that the mod he did is also something I could do as well and pointed out that I would have done a few things differently. I was never rude to him or trashed his modification but also noted that there are many here that either can not or for reasons known to them will not do it. The OP invited questions and I am asking them. As for Ohmmu now updating their website to claim that a BCI size 24F / DIN size H5 is a fitment to Maverick - even they claim you may need the included conversion spacer adapter to make it fit, the same website also specs an H4 size with 900+ CCA which is the most I have seen in that size and I am actually interested in that model if I need replacement....but, only if I can connect the vent tube back up to the battery since it is installed inside the cab of the vehicle.

Sorry that you took it as me slamming him - I am asking questions and I am glad he is responding to them.

 

[Grabber Rick]

No.

Because the OTA updates available for pre-25MY are for the infotainment system only - and no updates there for over a year - since the backup camera recall - which actually required tech wired updated.

On the 14th day non-started, you should get a DSM alert if working correctly.

Your 3hr tour probably pushed the voltage just over the limit, maybe more than just!
If it sat locked for over 8 hrs since then it also got a BMS Relearn which would have updated the SOC%. So that would have helped the DSM not being kicked off.

Checked my Ford app all still good on day 14. We had some 75 degree days and overnights in the 50's. The last couple days including today were much colder. I have kept the truck locked and parked in a slightly enclosed carport. Since the deep sleep messages started I have never gone this long without a deep sleep notice. I even drove from Pa to Knoxville Iowa last August and had deep sleep message in less than a week. I drove about 6 hours slept for about 5 hours then drove again for at least 5 more hours. Same thing on the return trip. Not sure why just a 3 hour drive has kept me out of battery saver mode. I am glad it is not in deep sleep because I was thinking my battery was bad.

 

[Grabber Rick]

Yes, that’s basically the idea.

From what Ohmmu told me, the sodium battery behaves electrically like a normal 12V starter battery, so normal charging equipment works fine. They recommended setting the vehicle battery profile to AGM, which is what I did in the Maverick.

The sodium chemistry can also tolerate higher charging voltages than typical lead-acid batteries (even above ~16V), so it isn’t sensitive to normal vehicle charging systems.

For reserve capacity, they told me the H4 is roughly ~100 minutes of usable RC. One thing that’s interesting with sodium is that it can safely discharge much deeper than lead-acid batteries, so that RC number represents actual usable capacity rather than stopping early to prevent damage like most lead-acid batteries do.

How do you reset to AGM? Does this require FORSCAN?

 

[Joaquin F]

How do you reset to AGM? Does this require FORSCAN?

Good question. The battery type setting isn’t something you can change through the normal Maverick menus. If you want to verify or change the battery configuration, it’s typically done through FORScan, which allows access to the vehicle’s BMS settings.

In my case, I did connect with FORScan mainly to verify the configuration. Interestingly, from the factory my Maverick was already set to the AGM battery type, even though the truck originally came with a standard flooded lead-acid battery.

The only parameter I adjusted was the battery charge target, which I changed from 90% to 100% so the system allows the DC-DC converter to fully top off the battery instead of stopping slightly short.

Since the sodium battery behaves electrically closer to AGM in terms of charging characteristics, leaving the system set to AGM aligns with the recommendation Ohmmu gave me as well.

So yes — FORScan was used to verify the battery type and adjust the charge target, but the AGM profile itself was already present from the factory.

 

[HeyBales]

Checked my Ford app all still good on day 14. We had some 75 degree days and overnights in the 50's. The last couple days including today were much colder. I have kept the truck locked and parked in a slightly enclosed carport. Since the deep sleep messages started I have never gone this long without a deep sleep notice. I even drove from Pa to Knoxville Iowa last August and had deep sleep message in less than a week. I drove about 6 hours slept for about 5 hours then drove again for at least 5 more hours. Same thing on the return trip. Not sure why just a 3 hour drive has kept me out of battery saver mode. I am glad it is not in deep sleep because I was thinking my battery was bad.

Reached 336 hours since last parked?
The 14 days isn't about voltage or SOC%, it's about length of time - system has no idea how much longer it won't be started - so it's supposed to disable the modem.

 

[HeyBales]

How do you reset to AGM? Does this require FORSCAN?

For those that have watched BMS system voltage and amp levels and compared - the AGM setting isn't actually used, because there is no change to what it does.

Maybe the 25/26MY though.
Because the manual does mention changing settings if you don't get exactly the same spec battery.

Pre-25MY hybrids the manual doesn't say that, only for EB's.

 

[Maverick Man]

HELP!!! I feel dumb asking but I thought the app notifications that the batter is in sleep mode had to do with the front, under the hood batter and NOT the under the backseat hybrid batter.

 

[Joaquin F]

HELP!!! I feel dumb asking but I thought the app notifications that the batter is in sleep mode had to do with the front, under the hood batter and NOT the under the backseat hybrid batter.

Just to clarify — on the Maverick Hybrid, the 12V battery is actually under the rear seat, not under the hood. The posts up front are just jump terminals.

So the deep sleep / remote services message is tied to the 12V battery under the rear seat, since that’s what powers the modules and FordPass system.

 

[Maverick Man]

Thank you!

 

[Joaquin F]

Thank you!

No worries follow the thread if you are looking for a solution to the battery drain lol. I am going to publish some more data in the weeks to come to show performance!

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