Struggling with hybrid battery issues… anyone else?

Seeking Help
1

I love my Maverick and want to keep it long-term, but I’m losing faith. It’s a 2024 hybrid with 15K miles, and I’ve had six deep sleep messages so far, with two dead batteries. The most frustrating incident was when the engine wouldn’t kick on even after a jump, leaving me stuck at 10 mph on hybrid battery power.

Luckily, I was at home and could trickle charge the battery. I disconnected and reconnected the negative terminal, and after two days, it started again—though with dashboard alerts. The dealership says the battery is fine and blamed a software issue, with a fix supposedly coming early next year.

In the meantime, what can I do? Should I trickle charge every night? Turn off FordPass? What has worked for others?

2

I had similar issues, but the recall to update the Battery Control Module (BCM) and a new battery under warranty fixed everything for me.

3

Rowan said:
I had similar issues, but the recall to update the Battery Control Module (BCM) and a new battery under warranty fixed everything for me.

BCM recall? I thought I had all the recalls done, but maybe not. They’ve refused to replace my battery. Thinking about just paying for a better one myself.

4

@Mackenzie
Consider a lithium iron phosphate (LiFePO4) battery. They’re pricier but last much longer, can handle deeper discharges, and have a more consistent voltage curve.

5

Laurel said:
@Mackenzie
Consider a lithium iron phosphate (LiFePO4) battery. They’re pricier but last much longer, can handle deeper discharges, and have a more consistent voltage curve.

Do you have any recommendations on brands or models?

6

@Sparrow
Not really. My experience is from solar systems and a motorcycle swap years ago. Just avoid no-name brands; they can be unreliable. Thankfully, LiFePO4 batteries are generally safer than other types.

7

Laurel said:
@Mackenzie
Consider a lithium iron phosphate (LiFePO4) battery. They’re pricier but last much longer, can handle deeper discharges, and have a more consistent voltage curve.

How much do these batteries usually cost?

8

@Jesse
Typically 2-3 times the price of lead-acid batteries, but they save money in the long run.

9

Laurel said:
@Mackenzie
Consider a lithium iron phosphate (LiFePO4) battery. They’re pricier but last much longer, can handle deeper discharges, and have a more consistent voltage curve.

Be cautious—your vehicle’s charging system may not be designed for LiFePO4 batteries.

10

@Vann
That’s why you need an automotive LiFePO4 with an onboard Battery Management System (BMS).

11

@Mackenzie
The BCM is the Battery Control Module. My battery replacement came after error codes showed up during diagnostics.

12

I replaced my 12V battery with an AGM one I found on Amazon for $112. Solved my issues completely. Didn’t even bother going to Ford because their batteries are junk.

13

Bailey said:
I replaced my 12V battery with an AGM one I found on Amazon for $112. Solved my issues completely. Didn’t even bother going to Ford because their batteries are junk.

What’s the process for resetting the system? I just got a new trickle charger and hope it helps with the morning struggles.

14

@Cai

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Don’t forget to reset the Battery Monitoring System (BMS) with the light flashes and brake presses.

15

@Bailey
Thanks, I’ll give it a try.

16

Bailey said:
I replaced my 12V battery with an AGM one I found on Amazon for $112. Solved my issues completely. Didn’t even bother going to Ford because their batteries are junk.

What size AGM battery did you buy? I can’t find any in the Group 99R size.

17

@Ocean
I used this one: UPLUS BCI Group 140R AGM. It fit perfectly without any modifications and includes a vent spot. Here’s the link: Amazon.com: UPLUS BCI Group 140R Car Battery, AGM-L50-UP Maintenance Free 12V 50Ah Premium AGM Batteries H4 LN1 Automotive Battery, 570CCA, 120RC : Automotive.

18

Bailey said:
@Ocean
I used this one: UPLUS BCI Group 140R AGM. It fit perfectly without any modifications and includes a vent spot. Here’s the link: Amazon.com: UPLUS BCI Group 140R Car Battery, AGM-L50-UP Maintenance Free 12V 50Ah Premium AGM Batteries H4 LN1 Automotive Battery, 570CCA, 120RC : Automotive.

Thanks! The H4 size is a bit taller, but it should work fine.

19

@Ocean
Yeah, it’s slightly taller, but it dropped in without issues. No need for mods, and it’s heavier than the OEM battery, which I take as a good sign.

20

Bailey said:
I replaced my 12V battery with an AGM one I found on Amazon for $112. Solved my issues completely. Didn’t even bother going to Ford because their batteries are junk.

Does switching to AGM void any warranties? And how hard is it to replace?