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Maybe I’ve missed something in earlier discussions but why not just use Ford’s Mastercraft 470 CCA? Guaranteed to fit and possibly supplied and installed free by Ford. That’s what happened to me when my H4 under warranty kept dying.

Why spend money on a battery u don’t need? Ur truck’s still under warranty right? Discuss with Ford Customer Service Mgr of ur problem and u understand there’s a bigger battery now. They don’t even carry the 390CCA battery anymore so obviously, Ford new it was undersized and a problem. They...

Yes, I thought of ur heat too after I posted. Lol. Good luck

No negative effects of pulling fuse 11. I said “if there were any negative effects…”. I have kept the fuse out. Fuse out alone should solve the battery drain problem. My truck was fine for a wk without the fuse and with the small 390 CCA battery. I took the bigger battery Ford offered me for...

Ur Qs: Ford won’t automatically replace a warranteed item if they don’t find anything wrong with it. Even after telling them it died on me three times and it was no fault of anything I did. Funn tho, Ford must’ve suspected it was a problem cuz mid-way thru ‘23 they upgraded the battery as said...

My battery died completely multiple times after just 14 months. My Ford dealer found nothing wrong with the battery of course. After much thought, I diagnosed the problem as follows: 1. It’s a weak 12v to begin with at 390CCA, 45Ah and 65 RC. Ford now uses a slightly bigger battery (470 CCA). 2...

Houston-You have a problem. Don’t feel bad. I’m in Canada and had a similar problem. The radio not shutting off is a new twist. I’m convinced the battery drainage is because of the telematics running 24/7 (truck constantly communicating with app, updating, whatever). U can’t turn it completely...

Yes, I’ve had no problems after pulling the dreaded fuse 11. Ford has agreed to upgrade my battery anyway to the 470CCA one too so I’m happy.

Nowhere near enough for a Mav. I drove mine about a half hr/dy about 4 days last wk. It went dead 3 times on me?? Dealer says it’s fine?? If u don’t drive it everyday, there’s 2 problems. Battery they installed in some Mavs are junk. Just 45Ah with mine?? If ur FordPass app is connected to the...

Perhaps I’m missing something but the only drain issue is when the truck is off and the telematics is running. I’ve shut that off as said. If the Mavs were designed with AGMs in mind, it makes sense then that they would’ve installed an AGM so I don’t buy that statement. It irks me to have to go...

Thx. Still learning stuff on this problem. I like the idea to change the charge rate but no idea how difficult that is to do. I’m guessing Ford wouldn’t do it as it may void the warranty. That cud also b a problem if a third party did it. I’m not yet convinced I need a big battery or AGM. I’ve...

I did jump my battery under the back seat in the conventional way. However, I used a battery charger on 12A setting. Worked fine.

Thx. Funny that my battery died completely multiple times after just 14 months. My Ford dealer found nothing wrong with the battery of course. After much thought, I diagnosed the problem as follows: 1. It’s a weak 12v to begin with at 390CCA, 45Ah and 65 RC 2. As such, it doesn’t recharge...

Thx Ozark, I will definitely try this simple thing first and hopefully won’t have to buy a $300 battery.

Me too. Dead after just 13 mos. No interior lights? I didn’t get any light, sound, notta! Had to use key to get in. Dealer doesn’t know why as battery checked fine of course. They wanted to keep the truck and run more tests once it dies. I guess we’ll see if buddy is actually correct that it’s...

Thx again, u sure seem to know about that battery. U should work at the dealer. They knew Jack s!?! I also have never heard of an AGM battery before unless they’re fairly new. After looking it up, they did mention lifespan of about 7 yrs is common. Cheers.

Thx Curtis, I do remember reading that somewhere. So long as pulling fuse 11 doesn’t turn off other things I may want. I will look into it.

Yes, I thought of this too as my battery died after just 13 mos. Seems like a bad design. There’s a huge bank of batteries that drive the truck at low speeds. Why didn’t they connect it to the interior car battery as a fail safe?? Engineers? Dealer doesn’t know the problem yet. I did disconnect...

Originally had an order in for a 2022 hybrid. Didn’t make the build list. Had to reorder for a 2023 hybrid in May ‘22. Got the truck 13 mos later in Jun ‘23. I’m in NS and guessing our area is very low on Ford’s list. Fast fwd 13 mos later to now and the car battery (under back seat) is dead...