Battery Life
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Cross-Country
Joined: Aug 2024
Posts: 52
Likes: 29
From: East Arkansas
Battery Life
I was awaken this morning at 340am by the Ford Pass app on my phone telling me that the "Remote features are disabled to preserve battery". Then it goes into a long list about the deep sleep mode and that remote features are unavailable because the battery charge level is low. This is a brand new 2024 F350 XLT 6.8L gasser with 700 miles on her with dual batteries and alternators and the upgraded Sync 4 system. I bought this to put slide in camper in to be able to remote camp for a few weeks at a time but now it has me wondering if I can safely park it without running for that long and still be able to start the darn thing because the electronics have sucked it dry. I don't do a lot of driving right now just local stuff. Does anyone have any knowledge of the battery life of these things or how long you can leave it off? I do carry a jump pack with me but would hate to rely on that as a backup.
Laughing Gas
Joined: Sep 2023
Posts: 801
Likes: 543
From: NE Ohio
Normal, and I have not had an issue starting it after it has gone to deep sleep after sitting a week or so.
Because we do mostly short drives in our vehicles I will put them on a charger overnight once in a while to take the batteries back up to a full charge.
Because we do mostly short drives in our vehicles I will put them on a charger overnight once in a while to take the batteries back up to a full charge.
Lead Driver
Joined: Feb 2022
Posts: 7,975
Likes: 4,052
Ford has had a batch of bad batteries, had to have one of mine replaced and I just got the truck, the truck is 8 months old, I had it 2 months. Your best solution is to take a battery out, deep charge it, swap with the other battery and deep charge it as well and put them back in. This way you know they are fully charged, and let the truck sleep. Unless you are planning to go for a LOONG drive to charge the battery, and not to do something with it, leave it off, this way everything stays shut down to minimize keepalive drain.
Because of all the keep alive functions, if the truck is a garage queen, taken out once a month, your best bet is to put a battery maintainer on it, so the batteries will last longer.
It's too bad we don't have an option to put the truck to sleep, like a storage function that only keeps the critical crap alive. That way when we know the truck will be sitting for a week or more, we can keep the batteries at their peak.
Because of all the keep alive functions, if the truck is a garage queen, taken out once a month, your best bet is to put a battery maintainer on it, so the batteries will last longer.
It's too bad we don't have an option to put the truck to sleep, like a storage function that only keeps the critical crap alive. That way when we know the truck will be sitting for a week or more, we can keep the batteries at their peak.
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Cross-Country
Joined: Aug 2024
Posts: 52
Likes: 29
From: East Arkansas
It never ceases to amaze me how things have changed soooo much in the last 50 years. In 1978 I left my 1975 Plymouth Fury in the long term parking area of the Navy base in Mayport Florida and went overseas on a 9 month long cruise came back and it started right up. I don't think that would be possible today. 
Lead Driver
Joined: Feb 2022
Posts: 7,975
Likes: 4,052
It never ceases to amaze me how things have changed soooo much in the last 50 years. In 1978 I left my 1975 Plymouth Fury in the long term parking area of the Navy base in Mayport Florida and went overseas on a 9 month long cruise came back and it started right up. I don't think that would be possible today.
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Laughing Gas
Joined: Jun 2023
Posts: 1,147
Likes: 643
From: McKinney, TX
It never ceases to amaze me how things have changed soooo much in the last 50 years. In 1978 I left my 1975 Plymouth Fury in the long term parking area of the Navy base in Mayport Florida and went overseas on a 9 month long cruise came back and it started right up. I don't think that would be possible today.
With your dual battery setup, I believe you have AGM batteries as well, so that is sort of interesting. My single-battery setup has a standard lead/acid battery. I think the stock Motorcrap battery is junk... it has already started to leak... and I intend on replacing it when I get it back to TX in January. If you are going to be out in the boonies, I would darned sure have a backup plan.
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Mountain Pass
Joined: Jul 2024
Posts: 136
Likes: 64
Ford has had a batch of bad batteries, had to have one of mine replaced and I just got the truck, the truck is 8 months old, I had it 2 months. Your best solution is to take a battery out, deep charge it, swap with the other battery and deep charge it as well and put them back in. This way you know they are fully charged, and let the truck sleep. Unless you are planning to go for a LOONG drive to charge the battery, and not to do something with it, leave it off, this way everything stays shut down to minimize keepalive drain.
Because of all the keep alive functions, if the truck is a garage queen, taken out once a month, your best bet is to put a battery maintainer on it, so the batteries will last longer.
It's too bad we don't have an option to put the truck to sleep, like a storage function that only keeps the critical crap alive. That way when we know the truck will be sitting for a week or more, we can keep the batteries at their peak.
Because of all the keep alive functions, if the truck is a garage queen, taken out once a month, your best bet is to put a battery maintainer on it, so the batteries will last longer.
It's too bad we don't have an option to put the truck to sleep, like a storage function that only keeps the critical crap alive. That way when we know the truck will be sitting for a week or more, we can keep the batteries at their peak.
Lead Driver
Joined: Feb 2005
Posts: 7,944
Likes: 2,653
From: The Great State of Texas
Ford has had a batch of bad batteries, had to have one of mine replaced and I just got the truck, the truck is 8 months old, I had it 2 months. Your best solution is to take a battery out, deep charge it, swap with the other battery and deep charge it as well and put them back in. This way you know they are fully charged, and let the truck sleep. Unless you are planning to go for a LOONG drive to charge the battery, and not to do something with it, leave it off, this way everything stays shut down to minimize keepalive drain.
Because of all the keep alive functions, if the truck is a garage queen, taken out once a month, your best bet is to put a battery maintainer on it, so the batteries will last longer.
It's too bad we don't have an option to put the truck to sleep, like a storage function that only keeps the critical crap alive. That way when we know the truck will be sitting for a week or more, we can keep the batteries at their peak.
Because of all the keep alive functions, if the truck is a garage queen, taken out once a month, your best bet is to put a battery maintainer on it, so the batteries will last longer.
It's too bad we don't have an option to put the truck to sleep, like a storage function that only keeps the critical crap alive. That way when we know the truck will be sitting for a week or more, we can keep the batteries at their peak.
Lead Driver
Joined: Feb 2022
Posts: 7,975
Likes: 4,052
With Dual batteries, the passenger battery is the one taking the brunt of the work, removing the batteries and swapping locations is what I mean. Just like rotating tires, rotate the batteries. It must be something Ford changed because I have never had on battery consistently fail over the other in a dual setup, but lately this appears to be the trend with the passenger battery going bad while the drivers side being perfectly fine. Happened on my new truck, and has happened on at least 3 others on this forum the past year.
Mountain Pass
Joined: Jul 2024
Posts: 136
Likes: 64
With Dual batteries, the passenger battery is the one taking the brunt of the work, removing the batteries and swapping locations is what I mean. Just like rotating tires, rotate the batteries. It must be something Ford changed because I have never had on battery consistently fail over the other in a dual setup, but lately this appears to be the trend with the passenger battery going bad while the drivers side being perfectly fine. Happened on my new truck, and has happened on at least 3 others on this forum the past year.
Laughing Gas
Joined: Jun 2023
Posts: 1,147
Likes: 643
From: McKinney, TX
I wonder if Ford uses some sort of load switching between batteries... similar to the setup on big trucks. Most big trucks have (or used to have...) 4 batteries... 3 standard, and one deep-cycle; there was a switch that isolated the standard batteries when not needed to start and run the truck.
More Turbo
Joined: Nov 2015
Posts: 659
Likes: 312
From: Fort Worth
Batteries on my 2020 F450 platinum only last 11/2-2 years. One of the original batteries started leaking and was replaced under warranty. Luckily the other batteries failed at home instead of out on the road. So seven batteries total in almost 5 years . Sold the truck two weeks ago and have 2025 F350 7.3 on order.
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