Key fob battery; spec and warning

[Ron_Burgundy]

Perhaps - although I can now say that after 2 new batteries the experience for me has been the same.

Replace battery, no warning for a few days. Warning starts, and increases in frequency until I change the battery again and the cycle continues.

I am about to change it again, so I’ll see if that was a fluke or if it behaves the same way again.

My experience was I got the shake to wake daily during first 10 days and it would go away and fob was fine. Then fob just stopped starting car even with new battery. Battery certainly has something to do with it, but it’s not the root cause of fob problems.

 

[c0mbe]

My experience was I got the shake to wake daily during first 10 days and it would go away and fob was fine. Then fob just stopped starting car even with new battery. Battery certainly has something to do with it, but it’s not the root cause of fob problems.

Oh interesting. I’m sure they’ll get it soon. I have a lot of PTSD over my Air Dream (029) and the key. At least the key card is easier to use on the gravity with the charge tray instead of holding on the star.

I have never had my key fob start working again without the battery change… just seems to get progressively worse until I change it. And to answer a previous question: the door locks work longer than the vehicle start.

 

[Spaceiscoolright]

FWI my AGT came with two extra batteries for the FOB.

So I have a question. My AGT sometimes is slow to wake up as I approach with the FOB. I've noticed that if I jiggle the FOB in my pocket, the car wakes up. Is this a sign of a depleted battery?

I skimmed the thread and didn't see anyone answer your question. After owning a Tesla since 2017 and a Lucid since Feb of this year, that just seems to be how these fobs work. I've randomly had to just kinda shake my leg for both cars to wake up. Sometimes my wallet gets in the way of the signal. Your phone can as well. But other times it's just a fluke, nothing in the way, key right next to the car, and if you agitate it just slightly, the car wakes up.

I have not had any battery issues in key fobs with my Tesla or my Lucid thus far so I hope that trend continues.

 

[GoDestruction]

I skimmed the thread and didn't see anyone answer your question. After owning a Tesla since 2017 and a Lucid since Feb of this year, that just seems to be how these fobs work. I've randomly had to just kinda shake my leg for both cars to wake up. Sometimes my wallet gets in the way of the signal. Your phone can as well. But other times it's just a fluke, nothing in the way, key right next to the car, and if you agitate it just slightly, the car wakes up.

I have not had any battery issues in key fobs with my Tesla or my Lucid thus far so I hope that trend continues.

Gives more power to the phrase “shake a leg”

 

[bicycleguy]

I skimmed the thread and didn't see anyone answer your question. After owning a Tesla since 2017 and a Lucid since Feb of this year, that just seems to be how these fobs work. I've randomly had to just kinda shake my leg for both cars to wake up. Sometimes my wallet gets in the way of the signal. Your phone can as well. But other times it's just a fluke, nothing in the way, key right next to the car, and if you agitate it just slightly, the car wakes up.

I have not had any battery issues in key fobs with my Tesla or my Lucid thus far so I hope that trend continues.

The fob design is another compromise nothing debacle in my opinion. Lucid didn't design it but should have spec'ed and verified the battery life could be say 1 year. The CR2450 3V is used in a lot of electronics to replace smaller batteries (say CR1220) that because of mostly supply chain issues left over from covid caused many microcontrollers to be replaced by ones that draw a lot more power. The chip suppliers decided to drop the old slow low power chips in favor of the latest and greatest and the fob vendors decided that more fob to car communication could be done with these more powerful chips but ignored or tried to work around the power issue. Even with that great big beautiful battery, life was compromised. Whenever I see these batteries used on anything lately they don't last.

You can't have the fob running all the time and nobody wants to have to push a button on a fob heaven forbid, so one work around included with many a Bluetooth design is a built in accelerometer chip that draws almost no power but can be triggered by (your leg) movement to switch the key fob on. This can help. Once the fob is on it starts trying to communicate drawing a lot of power. If it can't find anything it shuts off after some predetermined time and quietness. If there's a bunch of cars around besides yours it has to communicate with them to find a match. That's why the faraday bag helps (shuts off quicker). Once your in the car it could be that the encryption required to start the car is a much greater draw than opening the car and or so much communication with the car has occurred negotiating profiles and stuff that the battery is too depleted by the time you try to start.

Oh well, I could go on forever.

 

[Denali_Dane]

Well my key fob battery died today after only one month of having a Gravity DE. it started giving me "shake your key to wake it up" messages two days ago and today it was totally dead. There's obviously something very wrong with how the battery is used if it only lasts a month so hoping Lucid gets a SW fix out for that soon (and/or implements apple's digital key). Until then, for those interested the battery is a CR2450 Lithium 3V, which is a thick / weird size that seems to be only available online, so highly recommend getting some extras to keep around.

Could have just been a bad or older battery.
Just be sure to replace it with a good high quality battery. Like an Energizer E2 lithium battery.

 

[Ron_Burgundy]

I’d happily replace the battery weekly if my fob worked and started out Gravity…

 

[Bill AGT]

The fob design is another compromise nothing debacle in my opinion. Lucid didn't design it but should have spec'ed and verified the battery life could be say 1 year. The CR2450 3V is used in a lot of electronics to replace smaller batteries (say CR1220) that because of mostly supply chain issues left over from covid caused many microcontrollers to be replaced by ones that draw a lot more power. The chip suppliers decided to drop the old slow low power chips in favor of the latest and greatest and the fob vendors decided that more fob to car communication could be done with these more powerful chips but ignored or tried to work around the power issue. Even with that great big beautiful battery, life was compromised. Whenever I see these batteries used on anything lately they don't last.

You can't have the fob running all the time and nobody wants to have to push a button on a fob heaven forbid, so one work around included with many a Bluetooth design is a built in accelerometer chip that draws almost no power but can be triggered by (your leg) movement to switch the key fob on. This can help. Once the fob is on it starts trying to communicate drawing a lot of power. If it can't find anything it shuts off after some predetermined time and quietness. If there's a bunch of cars around besides yours it has to communicate with them to find a match. That's why the faraday bag helps (shuts off quicker). Once your in the car it could be that the encryption required to start the car is a much greater draw than opening the car and or so much communication with the car has occurred negotiating profiles and stuff that the battery is too depleted by the time you try to start.

Oh well, I could go on forever.

STOP! I bought batteries as back up (CR 2450) as shown above, THESE BATTERIES ARE NOT USED IN THE LUCID FOB!
The FOB uses 2032!

 

[EVCar]

STOP! I bought batteries as back up (CR 2450) as shown above, THESE BATTERIES ARE NOT USED IN THE LUCID FOB!
The FOB uses 2032!

You're right. The 2032 is for the Air fob.
2450 is reportedly for the Gravity.

 

[9point81]

STOP! I bought batteries as back up (CR 2450) as shown above, THESE BATTERIES ARE NOT USED IN THE LUCID FOB!
The FOB uses 2032!

We are referring to the Gravity fobs. Which use 2450.

 

[steveairgt]

Not sure if Lucid still does this but every time Lucid mobile would come to my house to perform any service (on my AGT), no matter how small, they would always replace my battery, even if I wasn’t having an issue. They would even replace the battery in my second fob if I remember to mention it.

 

[Ron_Burgundy]

Not sure if Lucid still does this but every time Lucid mobile would come to my house to perform any service (on my AGT), no matter how small, they would always replace my battery, even if I wasn’t having an issue. They would even replace the battery in my second fob if I remember to mention it.

I can verify they do not do this for Gravity. Tesla did this, too, for the first 3-4 years…

 

[loefvinc]

Well my key fob battery died today after only one month of having a Gravity DE. it started giving me "shake your key to wake it up" messages two days ago and today it was totally dead. There's obviously something very wrong with how the battery is used if it only lasts a month so hoping Lucid gets a SW fix out for that soon (and/or implements apple's digital key). Until then, for those interested the battery is a CR2450 Lithium 3V, which is a thick / weird size that seems to be only available online, so highly recommend getting some extras to keep around.

Maybe bad battery. I ordered a pack of cell batteries from Amazon while still well within the expiration date, they would only last a few weeks. Bought a different brand and those are fine

 

[9point81]

Yep, I keep a good pack now. Replacing my battery over a week ago now and have had not one failure for key not detected. For Amy making a checklist for delivery, I would advise adding replace keyfob battery to it.

 

[steveairgt]

Maybe bad battery. I ordered a pack of cell batteries from Amazon while still well within the expiration date, they would only last a few weeks. Bought a different brand and those are fine

I’ve found that not all of the batteries from various brands are the same.

I usually buy this brand for all these type of batteries even though they cost a little more.

Renata​

 

[borski]

I’ve found that not all of the batteries from various brands are the same.

I usually buy this brand for all these type of batteries even though they cost a little more.

Renata​

Renata and Energizer are the most reliable brands.

 

[ilyabu]

STOP! I bought batteries as back up (CR 2450) as shown above, THESE BATTERIES ARE NOT USED IN THE LUCID FOB!
The FOB uses 2032!

I can guarantee the GRAVITY fob uses the CR2450

 

[DeaneG]

STOP! I bought batteries as back up (CR 2450) as shown above, THESE BATTERIES ARE NOT USED IN THE LUCID FOB!
The FOB uses 2032!

Since you already have the batteries, you might as well get a Gravity.

 

[037]

For those who wanted frequency data…

 

[RamShashi]

Well my key fob battery died today after only one month of having a Gravity DE. it started giving me "shake your key to wake it up" messages two days ago and today it was totally dead. There's obviously something very wrong with how the battery is used if it only lasts a month so hoping Lucid gets a SW fix out for that soon (and/or implements apple's digital key). Until then, for those interested the battery is a CR2450 Lithium 3V, which is a thick / weird size that seems to be only available online, so highly recommend getting some extras to keep around.

I had similar issue. It is a common complaint I believe. Either you should keep the Key fob at least 25 feet away or put it in a metal box or wrap it up in a tin foil, with that the two way communication is prevented and the battery does not dry out.