15.2v charging seems a bit high while driving

[mav47]

It seems to me like you may have actually, definitely, figured this out.

My one question really is this and it is completely out of ignorance - could you, in ForScan, change the battery type to flooded?
[/QUOTE]


Also in reply to @uga :

So far, so good I'd say!

In ForScan I did toggle the battery type to "flooded" at one time and did not see differences in the battery voltages. There may not even be a different set of charging parameters behind that "flooded" software toggle. I can't tell either way with certainty but it wouldn't surprise me either as there's really no need. Remember that these software toggles are not typically available to the vehicle owner.

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[mav47]

Hey mav47!

I also have my battery replaced with an AGM battery. Unfortunately, Deep Sleep still occur, with my car lasting barely a week before FordPass notify me. How often do you use your truck?

- Khoa

Mine will last more than two weeks before doing into deep-sleep and that is what this feature is for, and I consider that ok. Yours lasting only one week seems a bit short.

I have a 40 mile commute, and that is likely helpful here. If you drive only short trips before you park it for a week things are likely different.

One thing to check: are you certain you have an AGM battery in there now?

Finally: did Ford change the battery cable from the battery positive to the main fuse holder under the hood? Many earlier Hybrids come with a cable lug that's incorrectly soldered at the fuse box side, so it detaches from the cable. This results in dead batteries and/or low voltages at the battery, etc. My 2022 Hybrid suffered from this too, and Ford replaced it under Customer Satisfaction Program 22B39.

 

[scotty]

In these forums I did not find a single "GROUP TYPE" for the proper battery in the Maverick Hybrid. Various owners put an H5 type battery in their Hybrid, but had to cut off two tabs that keep the battery in place. I didn't like that idea as I feel the battery should be safely held in case of collisions, etc.

Someone in this forum (sorry, cannot find the post, otherwise I'd link it) posted a link to this website, which was helpful.

As it turns out, after measuring the proper battery size for the Maverick Hybrid is:

GROUP 140R (=BCI code, most common in US)
LN1 (seems to be a Yuasa Japanese code)
H4 (DIN code, so European designation)

And it bolts right in.

I found that 50Ah AGM versions of this battery type listed around 570CCA and 80RC (=reserve capacity, which is likely more important for the hybrid than CCA)

Compare that to the OEM flooded chemistry battery that came with the truck: 45Ah, 65RC.

I bought one of these Group 140R/LN1/H4 UPLus AGM batteries on Amazon: https://www.amazon.com/dp/B0CM3GZWXX?th=1, but do note that they only showed Qty 20 in stock and now they don't show H4 as available anymore (only H5, H6 are currently listed, but that may change again). Was a bit of a gamble, but the company behind these batteries is a big one so I thought I'd try it for $134 minus a 10% coupon and including shipping. Most all these AGM batteries are made overseas anyways, I think you can have just as much good or bad luck with a better known brand one.

That UPlus battery came shipped in GREAT packaging, well protected and seems well made. I think it will be fine.

An alternative I looked at is that LN1 AC Delco that was listed above by @uga , also at RockAuto https://www.rockauto.com/en/moreinfo.php?pk=8878472

I think you likely cannot go wrong as long as you buy a battery of this group 140R size and as long at it is an AGM battery.

I'll post if my luck with this UPlus battery changes

I really like all that open space you have without a wall beside the battery for access compared to the space in my picture below. A shirt is in my compartment therefore prevents you from seeing my wall.

You really won't have any problem getting that bolt out that holds the clamp down.
I wish mine was the case.

What steps did you take in order to make your compartment that way?
Did you use a hack saw to remove the wall boarding the battery?
I sure wish you had pics showing you take it apart. I just feel confident doing it.

Do you still have the lid on the top that closes down on top of battery or did you fabricate something or just leave it open?

I guess you took the wall out for installing a larger battery?

 

[mav47]

@scotty

My original picture was taken with the battery enclosure/cargo bin under the seat removed (and I put it back in after replacing the battery). I recall it actually only took a few minutes to remove it.

Open the rear doors, put up the rear bench seat, empty the storage bins on both sides of the battery, and remove the lid above the battery.

Next you can pull up on the threshold trim that covers the bottom of the rear door opening (just pull it up). After this is out you'll see the edge of that cargo bin/battery enclosure is free to be lifted.

Now you can pull up on cargo bin itself, It is also simply clicked in in multiple places using clips and you mostly pull it straight up. Start in one corner, and then work your way around. It'll be completely loose and you simply lift it out of the truck. If I recall correctly, there were no bolts to undo, but don't quote me on that, as it has been six months or so.

What you'll end up with then is the view as in my original picture with lots of access around the battery, making it easy to replace it. Reassemble in the reverse order.

To me it seems much easier to pull this cargo bin/battery enclosure out versus not doing so and trying to get to the battery hold down clamps using long extensions, etc.

Good luck!

 

[scotty]

@scotty

My original picture was taken with the battery enclosure/cargo bin under the seat removed (and I put it back in after replacing the battery). I recall it actually only took a few minutes to remove it.

Open the rear doors, put up the rear bench seat, empty the storage bins on both sides of the battery, and remove the lid above the battery.

Next you can pull up on the threshold trim that covers the bottom of the rear door opening (just pull it up). After this is out you'll see the edge of that cargo bin/battery enclosure is free to be lifted.

Now you can pull up on cargo bin itself, It is also simply clicked in in multiple places using clips and you mostly pull it straight up. Start in one corner, and then work your way around. It'll be completely loose and you simply lift it out of the truck. If I recall correctly, there were no bolts to undo, but don't quote me on that, as it has been six months or so.

What you'll end up with then is the view as in my original picture with lots of access around the battery, making it easy to replace it. Reassemble in the reverse order.

To me it seems much easier to pull this cargo bin/battery enclosure out versus not doing so and trying to get to the battery hold down clamps using long extensions, etc.

Good luck!

Big thanks for that information. Your pretty darn smart to figure it out.
This page i will keep as reference when battery is needed unless mine goes out before warranty expires. I don't know if the dealer includes installing a battery if battery is evaluated as bad.
I do hope the warranty would include installation since under warranty. Just don't know.

 

[scotty]

In these forums I did not find a single "GROUP TYPE" for the proper battery in the Maverick Hybrid. Various owners put an H5 type battery in their Hybrid, but had to cut off two tabs that keep the battery in place. I didn't like that idea as I feel the battery should be safely held in case of collisions, etc.

Someone in this forum (sorry, cannot find the post, otherwise I'd link it) posted a link to this website, which was helpful.

As it turns out, after measuring the proper battery size for the Maverick Hybrid is:

GROUP 140R (=BCI code, most common in US)
LN1 (seems to be a Yuasa Japanese code)
H4 (DIN code, so European designation)

And it bolts right in.

I found that 50Ah AGM versions of this battery type listed around 570CCA and 80RC (=reserve capacity, which is likely more important for the hybrid than CCA)

Compare that to the OEM flooded chemistry battery that came with the truck: 45Ah, 65RC.

I bought one of these Group 140R/LN1/H4 UPLus AGM batteries on Amazon: https://www.amazon.com/dp/B0CM3GZWXX?th=1, but do note that they only showed Qty 20 in stock and now they don't show H4 as available anymore (only H5, H6 are currently listed, but that may change again). Was a bit of a gamble, but the company behind these batteries is a big one so I thought I'd try it for $134 minus a 10% coupon and including shipping. Most all these AGM batteries are made overseas anyways, I think you can have just as much good or bad luck with a better known brand one.

That UPlus battery came shipped in GREAT packaging, well protected and seems well made. I think it will be fine.

An alternative I looked at is that LN1 AC Delco that was listed above by @uga , also at RockAuto https://www.rockauto.com/en/moreinfo.php?pk=8878472

I think you likely cannot go wrong as long as you buy a battery of this group 140R size and as long at it is an AGM battery.

I'll post if my luck with this UPlus battery changes

Thanks again for the picture and the written description you wrote about removing trim. Most the instructions how to remove I understand some I don't. Guess I rely more on visuals.

I did see on amazon now the uplus battery 140r h4 is back for sale. Not just the H5

Could you have slipped that battery you bought into the comparment without removing the plastic, but just hard to do?

I am just a bit doubtful ( if and when I do need a battery) that I can dismantle without breaking plastic. And don't want to steer at the trims all day wondering what comes out next.

You said go remove the threshold, But is the threshold trim connected to the B Pillar? Thats big and tall and may have a lot of clips holding it in place.

I wonder how many different separate plastic trim pieces there are needing to dismantle

I will get the job done because I'm not going to pay the extra cash to get it done for what I could do if need be.

 

[mav47]

@scotty

You can indeed swap the battery with another H4/Group 140R without removing the plastic around it as it fits through the top opening, and doing it that way was my initial plan.

But after fiddling for a while with long extensions and a flashlight (and a few bad words!) I instead opted to remove the plastic panels which was really super easy. Truly: you'll have no problem doing this, and it causes far less frustration. You'll only pull the threshold trim panel and then the cargo bin under the seat, that's all.

 

[scotty]

Great info and interesting read; puts my mind somewhat at ease regarding the 15.2v read. I’ll stick with the OEM 12v until I can’t. I’ll probably put an AGM in sooner rather than later based on the experiences within the MTC. This whole 12v battery issue is frustrating and should have been addressed by Ford by now. Thanks for all the input.

Hi Builder.
You said you stuck with the oem battery. Was your oem the same as mine? Because my battery gave warning message after 8months of ownership says low battery..I check the volts with engine off. It's 12.1 volts. by about 14.5 when running.

I got maverick in November 23, xlt hyrbrid. All stock.

My battery says it has390A sae/en h4 on the ford sticker on top of battery.
No ford sticker on side of battery.

I don't know if your battery is newer then mine (8 mths is mine). Does your battery still power up well? How long have you had it? Is it the same battery as mine?

 

[scotty]

In these forums I did not find a single "GROUP TYPE" for the proper battery in the Maverick Hybrid. Various owners put an H5 type battery in their Hybrid, but had to cut off two tabs that keep the battery in place. I didn't like that idea as I feel the battery should be safely held in case of collisions, etc.

Someone in this forum (sorry, cannot find the post, otherwise I'd link it) posted a link to this website, which was helpful.

As it turns out, after measuring the proper battery size for the Maverick Hybrid is:

GROUP 140R (=BCI code, most common in US)
LN1 (seems to be a Yuasa Japanese code)
H4 (DIN code, so European designation)

And it bolts right in.

I found that 50Ah AGM versions of this battery type listed around 570CCA and 80RC (=reserve capacity, which is likely more important for the hybrid than CCA)

Compare that to the OEM flooded chemistry battery that came with the truck: 45Ah, 65RC.

I bought one of these Group 140R/LN1/H4 UPLus AGM batteries on Amazon: https://www.amazon.com/dp/B0CM3GZWXX?th=1, but do note that they only showed Qty 20 in stock and now they don't show H4 as available anymore (only H5, H6 are currently listed, but that may change again). Was a bit of a gamble, but the company behind these batteries is a big one so I thought I'd try it for $134 minus a 10% coupon and including shipping. Most all these AGM batteries are made overseas anyways, I think you can have just as much good or bad luck with a better known brand one.

That UPlus battery came shipped in GREAT packaging, well protected and seems well made. I think it will be fine.

An alternative I looked at is that LN1 AC Delco that was listed above by @uga , also at RockAuto https://www.rockauto.com/en/moreinfo.php?pk=8878472

I think you likely cannot go wrong as long as you buy a battery of this group 140R size and as long at it is an AGM battery.

I'll post if my luck with this UPlus battery changes

So I believe i found the battery you have on amazon. see attachment.
It is a 140R agm. But amazon says it doesn't fit my ford maverick, see attachment.

Is this the same battery you bought?

because I can't really see lettering on your battery to compare.

 

[mav47]

So I believe i found the battery you have on amazon. see attachment.
It is a 140R agm. But amazon says it doesn't fit my ford maverick, see attachment.

Is this the same battery you bought?

because I can't really see lettering on your battery to compare.

@scotty

Yes, that is exactly the battery I got.

H4/Group 140R is the correct AGM battery for the Hybrid.

Don't worry whether they say it fits the Maverick Hybrid: it drops right in! Note that their 120RC figure on the listing is also incorrect: the product picture (label) actually shows the correct 80RC.

 

[rivermaverick]

Modern 'smart' charging systems can charge between 13 and 18 volts depending on ambient temperature.

 

[Builder]

Hi Builder.
You said you stuck with the oem battery. Was your oem the same as mine? Because my battery gave warning message after 8months of ownership says low battery..I check the volts with engine off. It's 12.1 volts. by about 14.5 when running.

I got maverick in November 23, xlt hyrbrid. All stock.

My battery says it has390A sae/en h4 on the ford sticker on top of battery.
No ford sticker on side of battery.

I don't know if your battery is newer then mine (8 mths is mine). Does your battery still power up well? How long have you had it? Is it the same battery as mine?

I have the exact same 390 CCA battery. My build was Oct 2023. Couple deep sleep messages during winter and often no dome lights but it started every time. As soon as the weather warmed, all the issues disappeared. I’m sure they will return with the cold. I have an AC Delco LNG AGM battery but just haven’t installed it yet. I’ll install it in the next month or so.

 

[MakinDoForNow]

Modern 'smart' charging systems can charge between 13 and 18 volts depending on ambient temperature.

My dash power point voltage meter shows the voltage climbing at startup above 14.7v at somewhere between 55-60°F and increasing 0.1v every few degrees cooler. Will be 15.1-15.3v in mid 40°'s. After one of the updates the rate the voltage increased in mid 40's went up close to 0.2v. appeared to be attempt to increase rate 12v was being charged.

 

[CurtisB]

@scotty

You can indeed swap the battery with another H4/Group 140R without removing the plastic around it as it fits through the top opening, and doing it that way was my initial plan.

But after fiddling for a while with long extensions and a flashlight (and a few bad words!) I instead opted to remove the plastic panels which was really super easy. Truly: you'll have no problem doing this, and it causes far less frustration. You'll only pull the threshold trim panel and then the cargo bin under the seat, that's all.

That's what I did. Totally easier to install.

 

[scotty]

@scotty

Yes, that is exactly the battery I got.

H4/Group 140R is the correct AGM battery for the Hybrid.

Don't worry whether they say it fits the Maverick Hybrid: it drops right in! Note that their 120RC figure on the listing is also incorrect: the product picture (label) actually shows the correct 80RC.

Ok, what you wrote encourages me because that battery is a lot less then Advance auto, die hard is$220. What does 80RC mean?

Owners manual says use bxt99rt-4A battery.

You have brought info. to a lot of us on the forum now and future readers. You need a trophy.

So stay with h4/group 140. Don't get a 99r t4 battery because it maybe different size and clamp may not attach to battery? Ensure it says agm battery on label.

Hopefully if and when I need the battery they will honor the 36 mths or close to it.

The stock battery in the Hybrid is a flooded cell battery, NOT an AGM, even though the settings in the vehicle are supposedly for an AGM battery. Note that comparable Toyota planetary gear hybrids all come standard with AGM batteries.

Word is that Ford has been unable to source enough AGM batteries, so they ended up putting flooded batteries in the Maverick Hybrids. Or it was simply a matter of cost as I understand they're still putting flooded batteries in these trucks.

Lots of Hybrid owners have reported deep sleep trouble caused by under voltage, which supposedly goes away after replacing the stock battery with an AGM. This to me indicates that this vehicle should have had an AGM battery in the first place.

After getting some deep sleep messages I played a bit with ForScan and changed the settings for the BMS (battery management system) from 80% state of charge to 95% state of charge (SOC). The system voltages never changed. It didn't seem to make a difference: I still got the occasional deep sleep.

Similar to the OP, a few weeks ago I put a voltage meter display in that same 12V plug and I noticed the same: system voltages between 14.8 (rare) and 15.1 (most of the time). I've seen 15.2V too! That seemed wild to me.

So yesterday I bit the bullet and installed a new Group 140R AGM battery. I also reset the BMS.

As others reported when replacing their flooded battery with an AGM: the system voltage instantly dropped to more "normal" values well below 15V!

Edit 4: with a few hundred miles on this new battery I have been seeing voltages between 14.6-14.8, right after startup and then after a while it drops down to 13.0V. Occasionally it will charge for a longer time steadily at at 14.6V. Seems to me that all is well.


Here's what I think happens on these Hybrids:

1) My abused (chronically undercharged) OEM flooded battery likely has too high an internal resistance, which means that it will accept fewer charging amps at any given voltage. This battery was probably always below its target SOC and the BMS tries to bring the SOC up by feeding it charging current, and it raises the voltage to get there (north of 15.0V). Essentially the BMS was ALWAYS charging the battery, and that's exactly what I observed: voltages always showing between 14.9 and 15.2V, likely still too low for a solid charging current to get the battery up to the required SOC.

2) The new AGM battery has a much lower internal resistance (lower even than a brand new flooded battery), and will take a significant charging current already at much more "normal" voltages: I'm typically seeing 14.6-14.8 when it is charging. Once the BMS determines the battery has reached the required SOC level, it drops the system voltage to 13.0V which means the battery does not charge anymore.

I'll keep an eye on it over the coming months, but I suspect that the deep sleep troubles are over.

Again: this vehicle should have had an AGM battery in the first place.

Edit 5, three months, and about 6,000 miles later: Indeed, the random deep sleep issues are completely gone, and the system voltages stay between 14.6 and 14.8V, dropping to 13.0V once the battery reaches its target SOC. Seems fine to me.

I've had ONE occasion where the truck reported going to deep-sleep, and that was after being parked for 16 days while we were on a family vacation. I consider that fine as that's what this deep sleep feature is for. Interestingly: when I first turned on the truck after 19 days it started charging at 15.2V for the first 10 min or so, then dropped to its normal 14.6-14.8V. That was the only time I've ever seen over 15V on the system with this AGM battery , and must have been due to a lower than normal SOC.

The stock battery in the Hybrid is a flooded cell battery, NOT an AGM, even though the settings in the vehicle are supposedly for an AGM battery. Note that comparable Toyota planetary gear hybrids all come standard with AGM batteries.

Word is that Ford has been unable to source enough AGM batteries, so they ended up putting flooded batteries in the Maverick Hybrids. Or it was simply a matter of cost as I understand they're still putting flooded batteries in these trucks.

Lots of Hybrid owners have reported deep sleep trouble caused by under voltage, which supposedly goes away after replacing the stock battery with an AGM. This to me indicates that this vehicle should have had an AGM battery in the first place.

After getting some deep sleep messages I played a bit with ForScan and changed the settings for the BMS (battery management system) from 80% state of charge to 95% state of charge (SOC). The system voltages never changed. It didn't seem to make a difference: I still got the occasional deep sleep.

Similar to the OP, a few weeks ago I put a voltage meter display in that same 12V plug and I noticed the same: system voltages between 14.8 (rare) and 15.1 (most of the time). I've seen 15.2V too! That seemed wild to me.

So yesterday I bit the bullet and installed a new Group 140R AGM battery. I also reset the BMS.

As others reported when replacing their flooded battery with an AGM: the system voltage instantly dropped to more "normal" values well below 15V!

Edit 4: with a few hundred miles on this new battery I have been seeing voltages between 14.6-14.8, right after startup and then after a while it drops down to 13.0V. Occasionally it will charge for a longer time steadily at at 14.6V. Seems to me that all is well.


Here's what I think happens on these Hybrids:

1) My abused (chronically undercharged) OEM flooded battery likely has too high an internal resistance, which means that it will accept fewer charging amps at any given voltage. This battery was probably always below its target SOC and the BMS tries to bring the SOC up by feeding it charging current, and it raises the voltage to get there (north of 15.0V). Essentially the BMS was ALWAYS charging the battery, and that's exactly what I observed: voltages always showing between 14.9 and 15.2V, likely still too low for a solid charging current to get the battery up to the required SOC.

2) The new AGM battery has a much lower internal resistance (lower even than a brand new flooded battery), and will take a significant charging current already at much more "normal" voltages: I'm typically seeing 14.6-14.8 when it is charging. Once the BMS determines the battery has reached the required SOC level, it drops the system voltage to 13.0V which means the battery does not charge anymore.

I'll keep an eye on it over the coming months, but I suspect that the deep sleep troubles are over.

Again: this vehicle should have had an AGM battery in the first place.

Edit 5, three months, and about 6,000 miles later: Indeed, the random deep sleep issues are completely gone, and the system voltages stay between 14.6 and 14.8V, dropping to 13.0V once the battery reaches its target SOC. Seems fine to me.

I've had ONE occasion where the truck reported going to deep-sleep, and that was after being parked for 16 days while we were on a family vacation. I consider that fine as that's what this deep sleep feature is for. Interestingly: when I first turned on the truck after 19 days it started charging at 15.2V for the first 10 min or so, then dropped to its normal 14.6-14.8V. That was the only time I've ever seen over 15V on the system with this AGM battery , and must have been due to a lower than normal SOC.

Hey I am understanding a bit about batteries since your writings. thanks.
You said deep sleep. What does that mean? Does it mean you have to jump the battery to get truck started?

You said you went vacationing 16 days and truck reported going to deep=sleep. How did you know it went to sleep. Do you use forscan or did you take out fuse 11 and still found out it went to sleep some other way?

You told me 140r h4 is good fit in battery compartment.
did you have any experience that says the H5 battery (weise) will fit just as easy?
The manual says use 99rt-4a battery. I couldn't find that battery on line anywhere.
Maybe that is motorcraft flooded specific.
Say only two batteries at Ford on line and they did say agm description.

You deserve trophy for all the help you give use on forum

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