Replacing 12v battery

[MichaelG]

See again my post that MM Mav kindly posted above....

https://www.mavericktruckclub.com/forum/threads/hybrid-12v-battery-replacement.28921/

Unless things have changed very recently, there are no T4 replacement options that have the needed vent provision and will fit in the Maverick's confined space w/o modification...

PS, my 2022 Maverick never experianced a Deep Sleep issue after I installed a Diehard battery.. Take that for what it's worth..

good luck...
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Are you saying that the DieHard battery that you replaced the OEM battery with does NOT have the provision to attach the vehicle vent hose?

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[Buzzmiller]

23E07 does not replace any prior TSB. They are each unrelated issues. The reason why 23E07 is automatically closed out if either TSB has been claimed is that they all update the same software modules (ABS module, BECM, and SOBDM-C), but for 3 entirely different issues.

Emission recall 23E07 is just that - an emissions recall.

TSB 23-2059 addresses EGR issues (and has additional hardware troubleshooting as necessary)

TSB 23-2060 addresses the "grabby brakes" issues

See thread: https://www.mavericktruckclub.com/f...h02s-malfunction-fhev-engine-mavericks.33244/

Jsus, do you think the battery cable crimp issue would cause my battery cold cranking amps to diminish over time as the battery is not getting the full re-charge while my Hybrid is running? Last time i had the truck in to the dealer they said the CCR was marginal at 270CCA, voltage 12.61V. I haven't taken it in yet for the cable replace CSP 22B39 yet as i want them to give me a new battery free also.

 

[scotty]

I paid for my replacement battery in my linked post above. My time is worth more than the ~$200 the DieHard battery cost me, plus no oil, grease or scratches in or on the truck, no waiting, no delays, no excuses, I know it was installed correctly, and I removed the questionable Motorcraft batteries from my truck's failure equation.

No Deep Sleep on my 2022 Maverick since I installed the DieHard, so it fix MY truck's issue.

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what is the model, group size. I'm looking to find that battery you got on-line. I noticed the existing
12v battery under back seat has a tube coming out of it and then a vent tube is connected to it.
You will need to enlarge pic maybe a bit larger to see it. You can see the tube right of the battery.

So i guess battery you bought had the tube coming out of it.

Did you install the battery yourself?

 

[scotty]

The short version is no.

The HV battery is feeding the 12v system about 13.5 to 14.7 volts any time the key is turned to run. It does not matter if you are going uphill, downhill, or parked in a parking lot.

My current theory is two fold:

1) they are cheap, poorly made batteries to begin with

2) the truck is drawing some low rate of power continuously, even when shut "off".

I think it does continually draw down power from battery at night. Because the sensor on the battery is always monitoring how much charge and amps is left in the battery.
Did you see the vent type looking tube going into the battery? And the gray sensor going to
the negative terminal. Isn't that the sensor that maybe drawling down power.

I looked and can't even find that battery on-line at a dealer location. Have you looked to see if the battery is for sale at a dealer location

 

[scotty]

Yes. Try it.
I replaced my 12v with a Duralast Gold a month ago. So far no Deep Sleep issues.

However, I still have my original battery sitting in my garage. I just checked it and it is at 12.35v. Haven't charged it in over 3 weeks. So there was obviously some draw on my battery, dropping it to 12.2v and into deep sleep.

Maybe this TSB will fix that.

I looked at the battery under the seat and saw a tube coming out from it with a rubber vent tube going over the tube coming out the battery. Did the duralast have that tube coming out from it.
See the picture attached. Look to the right of the battery. I don't see batteries with that tube that i have searched on line for. Can you give me a bit of explanation

 

[Gullzway]

I looked at the battery under the seat and saw a tube coming out from it with a rubber vent tube going over the tube coming out the battery. Did the duralast have that tube coming out from it.
See the picture attached. Look to the right of the battery. I don't see batteries with that tube that i have searched on line for. Can you give me a bit of explanation

It had the connection, I just use the existing vent tube.

 

[Johnkn]

what is the model, group size. I'm looking to find that battery you got on-line. I noticed the existing
12v battery under back seat has a tube coming out of it and then a vent tube is connected to it.
You will need to enlarge pic maybe a bit larger to see it. You can see the tube right of the battery.

So i guess battery you bought had the tube coming out of it.

Did you install the battery yourself?

Geeze, I've now provided my original Hybrid 12V battery install thread 3 times in this post... Did you actually take 3 minutes to read it?

https://www.mavericktruckclub.com/forum/threads/hybrid-12v-battery-replacement.28921/

Purchase the replacement battery, install it, attach the Maverick's vent tube to the new battery and drive....

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[scotty]

Geeze, I've now provided my original Hybrid 12V battery install thread 3 times in this post... Did you actually take 3 minutes to read it?

https://www.mavericktruckclub.com/forum/threads/hybrid-12v-battery-replacement.28921/

Purchase the replacement battery, install it, attach the Maverick's vent tube to the new battery and drive....

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Thank you. your information helped me quite a bit. I did see autozone and advance does install battery free. have always installed mine. but as you described that bolt way down low is tough to get at.

glad you removed the vent tube without breaking it. i imagine truck is still knew and not under hood with heating temps. anyway thank you

 

[Johnkn]

excuse my ignorance is the battery a AGM?

Thank you. your information helped me quite a bit. I did see autozone and advance does install battery free. have always installed mine. but as you described that bolt way down low is tough to get at.

glad you removed the vent tube without breaking it. i imagine truck is still knew and not under hood with heating temps. anyway thank you

The battery hold down bolt is plainly visible and readily accessible with an extension on the ratchet wrench, I just happened to have dropped the bolt and had to retrieve it. The vent hose is soft rubber, it’s not going to break.

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[scotty]

The battery hold down bolt is plainly visible and readily accessible with an extension on the ratchet wrench, I just happened to have dropped the bolt and had to retrieve it. The vent hose is soft rubber, it’s not going to break.

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Ok, i now see the hold down bolt. looks like 10mm. bolt may drop off as i lifted it upward and out from bottom. guess be ready for magnet to adhere it.

John as far as vent tube extending out from battery. Do i just give it a gentle turning tug
to release it so i can put it in the other battery?

Did you need to reset the BMS after installing new battery? I looked in my manual but couldn't find info. on that. thanks John for the willingness to help

 

[GPSMan]

My truck is driven six days a week and has been always.

My stock 12v is showing symptoms of sulfating. Symptoms started at about 5,000 miles. I'm now at 15,000 miles.

When an external power source is applied, either DC/DC converter during driving or from a wall powered charger, voltage climbs to 15.x in 2 or 3 minutes.

When shut down or disconnected, voltage immediately drops to 12.3 or 12.4 volts. Just turning on the LED dome lights drops it to 12.1 volts.

However, it has been like this for months. Strong enough to keep the computers active, and the HV battery and DC/DC does all the real work.

Charging via the pins under the hood, the BMS does detect this.

Overnight on a wall charger, SOC only went from 59% to 69%.

Drove to work, parked 10 hours, drove it home. Put on a wall charger again last night: SOC went from 69% to 79%.

However, even at the BMS reported 79% on a scan gauge, the moment I opened the door and the welcome lights came on, Volts on a volt meter went to 12.1.

 

[23grayXLT84]

Checking voltage is best done after 75+ minutes after shutting off to ensure all systems are asleep. This means when you park, pop open hood, get out and close the doors.

I have checked right after driving just for fun and seen my voltage as low as 11.9 for 5-10 minutes with it eventually settling at 12.33v.

Kind of related. Anyone think driving in ECO mode could reduce 12v charging ? In full ICE cars I think alternator charging is optimized to reduce drag on engine (better MPG). Could hybrids work similar ? ECO = more Regen , with keeping all that regen as much in the high voltage battery as possible?...just a thought .

 

[GPSMan]

Anyone think driving in ECO mode could reduce 12v charging ? In full ICE cars I think alternator charging is optimized to reduce drag on engine (better MPG). Could hybrids work similar ? ECO = more Regen , with keeping all that regen as much in the high voltage battery as possible?...just a thought .

No. I do not think that is possible or even desirable.

The amount of power (IE gas) required to recharge a 12v battery is trivial.
Minuscule compared to the power used to run everything else.

It's not working well probably due to quality control issues of the battery itself. Possibly due to programming errors. Possibly due to unanticipated circumstances. MPG gains is not a likely reason.

Mathematically, a fully discharged 12v battery to a fully charged battery would need 0.017 gallons at 100% efficiency. Which it's not.

But pick your efficiency value you like. At 40% efficient it would burn 0.0425 gallons. It's lost in the noise of daily driving.

Daily we're not needing to charge a fully discharged battery, but a partially discharged one.
Thus it is more like an ounce of fuel, not even a cup.

It's not (re)charging well due to some kind of mistake, or quality control issue.

 

[Dluep1]

is it still working for you? I am having the same problem,

 

[Dluep1]

I paid for my replacement battery in my linked post above. My time is worth more than the ~$200 the DieHard battery cost me, plus no oil, grease or scratches in or on the truck, no waiting, no delays, no excuses, I know it was installed correctly, and I removed the questionable Motorcraft batteries from my truck's failure equation.

No Deep Sleep on my 2022 Maverick since I installed the DieHard, so it fix MY truck's issue.

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