Weird electrical issues? What are these 2 batteries for?

[Donmatteo]

So like most of you, I have had these weird issues of battery draw, things not working randomly, remote start having issues here and there. Dealer replaced my battery a couple of weeks ago. Things got better, a lot better, but still had random things.

I was in the back of the truck cleaning it and saw a little panel under the rear passenger seat and found 2 batteries.

For science, I put them on the tester and BAT1 SoC was 20% and failed testing. BAT2 SoC was 45% and Failed.

What are these for? I am planning on replacing them on Tuesday.

Part number comes back as a battery for the inverter..

https://dealer.parts.ford.com/shop/en/us/electrical/battery-and-related-components/vehicle-battery-p-bhagmaux1b

 

[NJ2020]

That's for the pro power onboard, they are fed by a separate alternator. Doubt this is connected to your battery draw issues.