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12v Battery access location in Lightning frunk for easy replacement
jefro
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The battery won't be under the kind of pressure a normal gas engine battery would be. As you can see it is a baby battery. The location will be of importance to those that need to "reset" the computers if some issues happen maybe. If it is a 10mm then keep one in glovebox.
GoodSam
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I thought I saw battery jumper points under the front area plastic of the Frunk, that did not look as easy to get to? Page 420 of the Lightning manual shows the battery to the side!
Mike G
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Yeah, that "baby battery" is just as critical to the operation of the truck as the "baby battery" in the Mach-E...there are a lot of Mach-E owners who found that out. If that thing is dead your truck isn't going anywhere. And unlike an ICE vehicle disconnecting the 12v battery on a BEV or Powerboost to "reset" the computers doesn't work the way you think it might.
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Mike G
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Because some setting you might think would get reset don't actually. They are retained.
Mike
FlasherZ
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In some ways, yes - in some ways no.
Will it need to deliver hundreds of CCA to run a starter motor? No. That's why they get away with it being a "baby" battery.
However, in EV's that baby battery is abused more than a starting battery for an ICE. It's deep-cycled more than a starting battery. It keeps powering the computer controls in the truck while the vehicle is sleeping, until it gets low enough to require a recharge from the HV pack through a DC-DC converter.
This is also why these batteries tend not to last as long as ICE car batteries.
jefro
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The only way the baby battery gets abused is if you leave the truck without charge cord attached for a long time. (like any car or truck). Otherwise it's load is nothing.
Every EV forum mentions that one should be prepared to remove 12V battery connection if all else fails. The thing won't budge without that or a jumper box. Yes, OEM batteries are terrible and fail. I'm on my fourth battery in my old F150 all covered under warranty.
Every owner needs to know where the HIGH VOLTAGE disconnect is day one.
Every EV forum mentions that one should be prepared to remove 12V battery connection if all else fails. The thing won't budge without that or a jumper box. Yes, OEM batteries are terrible and fail. I'm on my fourth battery in my old F150 all covered under warranty.
Every owner needs to know where the HIGH VOLTAGE disconnect is day one.
GoodSam
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Lead acid batteries prefer being topped off? Is that why battery maintainers are good for little used vehicles?
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FlasherZ
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Lead acid batteries like being kept at full charge and begin to sulfate if the cell voltage drops too low (usually if battery isn't kept above 12.4v). Most of them for automotive use are built for minimal use (e.g., as a starting battery only). There are special kinds that are built differently for deep cycling (deep-discharge) but they're more expensive as they use thicker lead plates.
jefro
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If someone buys a F150 Lightning and lets it sit for months then they need to let others drive it. Don't be stingy.
Most lead acid batteries used in cars and trucks will last longer when on a maintainer. The maintainer has a program for how to keep the battery at best voltage.
Most lead acid batteries used in cars and trucks will last longer when on a maintainer. The maintainer has a program for how to keep the battery at best voltage.
GDN
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They don't on the Powerboost because there is a secondary battery under the back seat. I believe it also has to be disconnected.
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