I've already had issues with my 2025 STX F150 regarding battery voltage. I just completed upgrading the speakers and adding an amp. During construction, I repeatedly opened and closed the doors which I'm thinking drained the battery over several days of not driving it. The myford app sent me a notification stating most features were disabled due to low battery. As a precaution, I installed a battery tender pigtail and attempted to charge the battery. After 48 hours, the charger still showed less than 80 percent charged and kept charging. Is this normal? Seems weird to me that it would take over 48 hours to charge a new battery.

 

How much current does your battery tender provide? 1A-1.5A? Battery tenders are only meant to keep charged battery afloat; the current they provide is simply not enough to fully charge the battery in a reasonable time. For example, H7 battery is 80Ah, H8 is 95Ah. 48hrs at 1A provides only 48Ah, but you don't get full amount of it stored in the battery (losses, heat, etc); so the battery got maybe 30Ah? So what you see it right.
My recommendation is to get a real decent charger that can provide at least 10A; look for the one that also can do "repair" mode.
(for the record - I use NOCO 10A charger for the same purpose)

 

Thanks for shedding common sense. I have a big charger but figured all it needed was a nudge so i used a float charger when in reality it needed a kick in the pants.
I should have mentioned the dealer claimed to have installed a brand new battery while prepping for delivery to me. I've driven it 1000 miles since but honestly, I don't drive much since I have a work truck and when the wife and I go out, we drive her Mazda CX-9.

 

A general rule is one tenth of the amp hour rating is a normal charge range.
That is an H6 is about 74 AH. Charging would be at about 7 amps.
Then time to Float depends on how far down the charge started from.
Your talking about 6 hours +/- depending on charging level.
The higher the charge level the shorter the charge time.
But like everything else, the higher the charge rate the shorter the Battery life you can't really measure over the long term.
You may be using a charger more after using the sound system and the power it consumes over the drive cycles if they are not long enough.
Reason is the AGM Bats have some charge limits that makes drive time very important or a charger to make up for it may need to be considered, at times.
Good luck.

 

Welcome to the newer F150's, this is normal. Just letting the truck sit without using it for 2 weeks or so will result in the battery low warning with FordPass remote start disabled. Look at the ton of posts on the forums regarding this. I upgraded 2 sizes up in battery size and although it helped, it did not alleviate the issue.

 

Question: How long a drive would you estimate it takes to bring the battery back to a normal charge?

We're on a long road trip, and finished one leg about two weeks ago, after driving several days. The truck has been mostly sitting now for two weeks, other than once or twice, a very short drive. I got the low battery warning yesterday, so took it for a 20-30 minutes drive. Still has the warning.

So out of curiosity, for those who have been in this situation, how long a drive to bring it back to normal?

PS: I'm not worried about being able to start the truck if it goes to dead-town, as I have a battery jumper, a NOCO GB50, thanks to many threads in this forum. I'm just curious.

 

First of all, when the warning comes up I have no idea how discharged it really is. Secondly, I put in on my Noco charger when the warning comes up, so never drove it immediately to charge it. Because this is the only vehicle I purchased in my entire life that does this, I also bought a Noco jump starter that I keep with me.

 

As others have said, it is a common issue for newer fords.
(1). I believe it came with a H6 battery (70ah?) despite the battery tray fits a H8
(2). The factory setting for SOC (state of charge) is set to 70% meaning no matter how long you drive, it won't charge full.
I've done
(1) switches to a H7
(2) forscan-ed SOC to 90%
this has been done a year ago and have not got the warning msg since. I felt like the battery change made the most difference.

 

In my case an H8 battery only prolonged the battery warning another week to 3 weeks. Well, the 70% explains a lot. Really stupid. I don't care if it extends the battery lifetime a little. I just want a truck that works. I may look into forscan

 

The BMS system shuts off systems that consume power that aren't needed. It does this to give the battery every opportunity to start your truck when you need to go somewhere.