Key Battery Life

[Wivenhoe]

I had a message in the car today saying my key battery was low. I've changed it no prob. But I've had the car 6 months, keep the key in a tin a long way from the car. I've never known a key battery to deplete so quickly. They have lasted over 2 years in other cars.

Are others changing their key battery after only 6 months ? Please no responses about if we had a digital key ........ !

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[pm4s]

I bet your 2nd key's battery is still going strong so probably there lies your answer.

 

[Robin B.]

Yes, both of my key batteries discharged at the same time also within 6 months and that never happened to me before. My keys were kept in a faraday bag and now I think they may have been responsible for that happening. Not sure. But I’m not using them any longer. And keep the keys far away from the car.

 

[PrudentOcean]

I keep one key in a Faraday bag when I’m home to prevent someone from repeating the RFID signal, and I’ve taken the battery out of the second key. So far I haven’t had to replace the battery in the key I have been carrying since I picked up my car on February 19th 2025.

 

[krissrock]

had mine for 10 months and no key issues. I don't keep the key far either...it's literally hanging by the garage door.

maybe a bad battery...or keeping it inside the box is actual issue?

 

[pm4s]

Yes, both of my key batteries discharged at the same time also within 6 months and that never happened to me before. My keys were kept in a faraday bag and now I think they may have been responsible for that happening. Not sure. But I’m not using them any longer. And keep the keys far away from the car.

Could be poor batteries installed from Porsche, I would get some fresh Duracells in there (always worked for me). Anything under a year is poor effort.
Another possibility would be based on the manufacturing date of your car that it sat for some time say couple of months at the port/dealer/getting updates/etc. with the keys near which would have drained the batteries.

 

[Wivenhoe]

Thanks for all responses. in my case, my car was manufactured and delivered with 2 I’ve replaced the battery with a decent one so let’s see how long it lasts.

 

[krissrock]

i think you jinxed me.... i just got the low battery warning today

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