2025 Hybrid - Potential Battery Drain?

[MakinDoForNow]

They tested the battery which read as:

Good - Recharge.
Voltage: 12.24
Measured: 449 CCA
Rated: 540 CCA
Temp: 74 °F.
"Battery is good, but low on charge. Fully charge battery."

It then lists common things to check for low charge.

The issue was very odd to me. Upon opening the door this morning, my usual clicking noises was interrupt near the middle portion, and continuously looped that click over and over, even after shutting the key to the office position.

It kept looping until what I assume was the battery going out, no longer allowing the click process to complete, or even go through it's shut off sequence after exiting, w key out. Felt like a glitch of some sort imo. Especially since it did not stop clicking after turning key to off..

The battery test you show was the quickie test with the hand held. Was done on my 34 month original OEM ,390cca. They told me the same "low, charge it". I asked for the overnight charge fully then load test, etc. Service rep asked manager and told him that I have had the battery almost continually on noco g5. She then asked 4-5 questions to put onto work order. I told her that they could keep truck for several days if needed. Called late the next day and said battery tested having a bad cell and they replaced it with the 470cca FLA BXT99RT4-A.

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[bcoo4]

The battery test you show was the quickie test with the hand held. Was done on my 34 month original OEM ,390cca. They told me the same "low, charge it". I asked for the overnight charge fully then load test, etc. Service rep asked manager and told him that I have had the battery almost continually on noco g5. She then asked 4-5 questions to put onto work order. I told her that they could keep truck for several days if needed. Called late the next day and said battery tested having a bad cell and they replaced it with the 470cca FLA BXT99RT4-A.

Nice! Thank you for the response. I plan on writing my dealer a detailed explanation and requesting further support, to troubleshoot/find the cause of the issue/ and resolve if applicable.

Even though they cleared the codes and the issue has not returned. Do you think they would set an appointment for this under warranty?

 

[MakinDoForNow]

Nice! Thank you for the response. I plan on writing my dealer a detailed explanation and requesting further support, to troubleshoot/find the cause of the issue/ and resolve if applicable.

Even though they cleared the codes and the issue has not returned. Do you think they would set an appointment for this under warranty?

All codes should remain on Fords server until they delete them from there maybe many years. As far as the overnight battery test, the dealer has to have a reason to run the test and have Ford Pay for it. Something like calling ford roadside or jump start several times. If your dealer only has one of the big testers and it's booked for over a week that could affect how agreeable he would be. Good luck.

 

[KenE]

I am not agreeing the battery quality is the issue. What makes them shit quality? My Transit is almost 11 years old with 120,000 miles and still has the original 2 AGM batteries and I have never put a charger on them. My 007 Mustang original FLA battery lasted 13 years! I did put a battery tender on it in the winter when it was parked for months at a time. But my Maverick is having battery issues. There is no doubt in my mind the charging system is not charging the damn battery to full charge when I drive it. When my dome lights fail to come on I throw a charger on it and it gets fully charged. It will then go about 10 days before the dome lights fail to come on again. That tells me the vehicle is not charging the battery to 100%. I have had the battery checked and have been told every time it is OK. Ford needs to fix the charging system not the battery.

I have 25MY Lariet Hybrid. From the factory the 12V battery only gets charged to 80% charge via firmware setting. I was getting occasional deep sleep after it sat for several days. Using Forscan i changed that to 85% charge from default 80% and hasn't exhibited deep sleep since. The 12v AGM battery is always > 12.3V sitting idle. I check it often. Running charge voltage is 14.6V. There are many discussions on ideal AGM charge level in our Maverick. This works fine for me.

 

[gzebrick]

Fwiw our 25 lariat hybrid had a no dome light battery save function 2 times since we brought it home in April. No alerts or alarms, just no interior lights. Started right up. Truck was probably just sitting in the garage for 5 or,so days.

I think my issue is we live where there’s no cell coverage and the truck is trying to ping a cell tower 24/7/365, draining the battery ( my iPhone dies in a day here for the same reason).

I now have a cheap battery trickle charger in the garage that keeps the mav’s 12v happy. No issues now, though before the no dome lights was just a minor annoyance. A feature, not a bug.

 

[gzebrick]

I have 25MY Lariet Hybrid. From the factory the 12V battery only gets charged to 80% charge via firmware setting. I was getting occasional deep sleep after it sat for several days. Using Forscan i changed that to 85% charge from default 80% and hasn't exhibited deep sleep since. The 12v AGM battery is always > 12.3V sitting idle. I check it often. Running charge voltage is 14.6V. There are many discussions on ideal AGM charge level in our Maverick. This works fine for me.

Are you sure it’s the 12v battery and not the hybrid hv battery that has a 80% limit? I thought the hybrid max charge was limited to,80% to leave room for regen ( during normal driving I never see the charge to to 70% regardless of the limit)

 

[HeyBales]

Are you sure it’s the 12v battery and not the hybrid hv battery that has a 80% limit? I thought the hybrid max charge was limited to,80% to leave room for regen ( during normal driving I never see the charge to to 70% regardless of the limit)

HVB is usable 30-70% SOC.

12VB has a figure of 80% in a setting - it's not max charge though - it's likely when it's supposed to go to Float charge amp level - that's what the logs seem to indicate.
I just got done with long trip, and amps was below 0.5, so the display figure was rounded down to 0 above 80%.
But the SOC went from 80 to 85%. Obviously very slowly. Which is correct for final float charge.
Most chargers if they spell out their charging rates, do similar.

But many of us have proved 85% is a fully charged battery in Ford's weird SOC scale.
So 80% is almost there.
On a good battery at least - start getting sulfated the BMS seems to know, backs off the charging rate correctly.

So that change to 85% just means what normally happens up to 80% - amps hanging around 3-5, before dropping to 1-2, and finally bouncing between 0 and 1 (so probably 0.45 to .9) - happens all the way to a fully charged battery now.

Other problem is - the system has some bad readings of Amp Hours charging/discharging I'm sure - so the math for that SOC% is probably wrong - so aiming for 85% is still fine.
And some driving scenarios it probably helps great - others that do long drives may not help as much.

 

[JohnCondren1933]

I am not agreeing the battery quality is the issue. What makes them shit quality? My Transit is almost 11 years old with 120,000 miles and still has the original 2 AGM batteries and I have never put a charger on them. My 007 Mustang original FLA battery lasted 13 years! I did put a battery tender on it in the winter when it was parked for months at a time. But my Maverick is having battery issues. There is no doubt in my mind the charging system is not charging the damn battery to full charge when I drive it. When my dome lights fail to come on I throw a charger on it and it gets fully charged. It will then go about 10 days before the dome lights fail to come on again. That tells me the vehicle is not charging the battery to 100%. I have had the battery checked and have been told every time it is OK. Ford needs to fix the charging system not the battery.

Your 12vdc battery is charged by the massive 240vdc traction battery, which is charged by the hybrid-drive motor-generator & that is absolutely getting charged or you wouldnt be driving.

Maybe the traction-battery dc-dc converter is shutting off early, my bet is on something in your car draining the 12vdc battery after you power down, do you have a wireless charger or a dash cam hooked up to the 12vdc set to motion record all night?

Maybe theyre failing they shouldn't totally drain your 12vdc but unless you leave the car key on & in park, the 240vdc traction battery will not keep recharging the 12vdc all night, then starting the engine to recharge itself when its charge drops too much.

 

[HeyBales]

Your 12vdc battery is charged by the massive 240vdc traction battery, which is charged by the hybrid-drive motor-generator & that is absolutely getting charged or you wouldnt be driving.

Maybe the traction-battery dc-dc converter is shutting off early, my bet is on something in your car draining the 12vdc battery after you power down, do you have a wireless charger or a dash cam hooked up to the 12vdc set to motion record all night?

Maybe theyre failing they shouldn't totally drain your 12vdc but unless you leave the car key on & in park, the 240vdc traction battery will not keep recharging the 12vdc all night, then starting the engine to recharge itself when its charge drops too much.

You left one part out of your process there.

The BMS decides HOW much to charge the 12VB, how many Amps.

Your 120V potential 12A home electrical system matters little to your phone plugged into an old style 5V 1.2A USB adapter charger.

And that truck system while designed by engineers that probably knew what they were aiming for - were also probably told to do things a certain way by some liability attorney and marketing and regulator groups.

 

[MakinDoForNow]

Fwiw our 25 lariat hybrid had a no dome light battery save function 2 times since we brought it home in April. No alerts or alarms, just no interior lights. Started right up. Truck was probably just sitting in the garage for 5 or,so days.

I think my issue is we live where there’s no cell coverage and the truck is trying to ping a cell tower 24/7/365, draining the battery ( my iPhone dies in a day here for the same reason).

I now have a cheap battery trickle charger in the garage that keeps the mav’s 12v happy. No issues now, though before the no dome lights was just a minor annoyance. A feature, not a bug.

I believe the dome light is not activated when door is opened if the truck has not had the door opened for seven days regardless of the battery soc (though it will not be anywhere near 100% soc).

 

[Darryl]

Hello Gang,

Figured Id post a thread indicating my first issues with MY25 Hybrid. Off the bat I assume its the classic battery drain issue posted here many times over.
I thought this was mostly fixed going into the 25 refresh?! (Different AGM Battery?)

Alas, When I went to go to work this morning, I opened the door to no Logos on the illuminated screens (just illuminated backlight in black), and just a constant clicking under the hood. The biggest indicator that something was not right, was that I heard the Old Version of the Ford Doorbell Chime (higher treble frequency ding-a-ling - Annoying), Not the usual calmer/quieter ding-a-ling which I have heard only since purchase. The backlights on the screens and buttons would all illuminate and then go out, in a loop. The truck never attempted to turn over upon full key turn.

This lasted about 5 minutes, until clicking stopped and there is no response when turning the key to any position.
I put it on a battery tender and am calling my dealership, asap.
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Personal Ranting:

I would think with all of the tech on/in this vehicle, there would be a simple way to warn me about the battery potentially getting low or needing a charge?! I mean the App will alert me when my Washer fluid is low... Why would the system allow me to get into a situation like this without a single warning sent to either the app, or during my previous drive? (Saturday afternoon).

Weird thing is, I brought my truck in the previous week for its first oil change. Now this...

I feel like Ford should be supplying a Jump pack free of charge unless they can confirm the issue will not return...

Thank you all for any tips, tricks, advice, and/or info.

If you got an early production 2025, the SSM suggesting an update of the air condition control module applies to your vehicle. I have read through all the comments to see if it was done yet. If it hasn’t been done yet , doing so will probably will fix it. Also, it depends on how long your vehicle sat up. At the dealership prior to purchase. Sometimes the sales people don’t start the vehicles regularly. And the battery will go dead just from normal battery drain. When the battery is charged up, it passes the test. But the life is often shortened. Ford will not reimburse a dealer for a battery that goes dead while it is in our possession because they know that it probably went dead from just sitting there. However, once the customer takes possession of the vehicle, the battery will be covered under the warranty if it’s bad. Also,your battery is borderline. If you take it to the dealership if it happens again, the battery will probably fail. We have had batteries pass the quick test but fail when tested by the “official “ charger and vice versa.

 

[KenE]

Are you sure it’s the 12v battery and not the hybrid hv battery that has a 80% limit? I thought the hybrid max charge was limited to,80% to leave room for regen ( during normal driving I never see the charge to to 70% regardless of the limit)

Yes, the 12V battery, not the High Voltage Hybrid battery. I believe the Hybrid battery also has 80% charge level, which i doubt can be altered with Forscan. Also, many guys with 2022-24 Mavs with Flooded cell batteries change 12V battery charging level to 100%.

 

[bcoo4]

If you got an early production 2025, the SSM suggesting an update of the air condition control module applies to your vehicle. I have read through all the comments to see if it was done yet. If it hasn’t been done yet , doing so will probably will fix it. Also, it depends on how long your vehicle sat up. At the dealership prior to purchase. Sometimes the sales people don’t start the vehicles regularly. And the battery will go dead just from normal battery drain. When the battery is charged up, it passes the test. But the life is often shortened. Ford will not reimburse a dealer for a battery that goes dead while it is in our possession because they know that it probably went dead from just sitting there. However, once the customer takes possession of the vehicle, the battery will be covered under the warranty if it’s bad. Also,your battery is borderline. If you take it to the dealership if it happens again, the battery will probably fail. We have had batteries pass the quick test but fail when tested by the “official “ charger and vice versa.

Can you explain more? "the SSM suggesting an update of the air condition control module applies to your vehicle."

SSM?

I did get 1 over the air update for telematics (location based info/modules)

Is there a way to see what updates have been sent or scheduled?

 

[HeyBales]

It's on the actual ACCM, which is on the AC unit - OTA doesn't appear possible as truck needs to be running while it's updated as part of process.

SSM53801
https://www.mavericktruckclub.com/f...attery-drain-issue-update-fix-released.67045/
Intermittent battery drain due to issue with ACCM.
Note the dates - hence the comment on early production.

 

[Mavster Mechanic]

So my 2022 STOCK battery (with ScanGaugeIII) did something odd.

Started with 60% showing and 11.1V with headlamps on and dome light on and not much else.

I detached it from the truck.
I put it on a smart (NOCO) 5 amp charger with desulfate cycle for 12 hours.

Reconnected it.
Did no song or dance or headlamp flashing.

Instantly, SOC was reading 95%.

Drove 45 minutes at highway speed.
Mid-way the truck did an instant stair-step on the 12v reading from 95% to 65%.

Parked at 65°F to 80°F for 8 hours.
Restarted. 12v displayed 75% SOC.
Drove 45 minutes on the highway.
Mid-way the truck did a stair-step jump back down to 65% on the display.

Parked overnight for 12 hours.
75°F to 50°F overnight.
Next morning, 70% soc for 12v batt.

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