? Leaving Key Fob in the Car Degrades Battery? | FerrariChat
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? Leaving Key Fob in the Car Degrades Battery?

Discussion in 'Technical Q&A' started by AEHaas, Jul 10, 2022.

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  1. AEHaas

    AEHaas Formula 3

    May 9, 2003
    1,464
    Osprey, Florida
    Full Name:
    Ali E. Haas
    #1 AEHaas, Jul 10, 2022
    I have not driven my 812 SF for 2 or 3 weeks at a time and never had any battery issues. But once I left the key fob sitting in the car for a week and it seemed to discharge the battery way down. Has anybody else noticed this behavior?

    Ali
     
    Llenroc likes this.
  2. tbakowsky

    tbakowsky F1 World Champ
    Consultant Professional Ferrari Technician

    Sep 18, 2002
    19,827
    The Cold North
    Full Name:
    Tom
    #2 tbakowsky, Jul 10, 2022
    Yes. The car will not go to "sleep" if a keyless fob is left inside.
     
    Llenroc, spaghetti_jet and Qavion like this.
  3. Ferrari Tech

    Ferrari Tech Formula 3

    Mar 5, 2010
    1,201
    Georgia
    Full Name:
    Wade Williams
    #3 Ferrari Tech, Jul 11, 2022
    100%, I do not leave key FOBs in cars in the shop. They will stay "awake" and it can cause increased battery drain. I also discovered you can leave your spare key FOB in the books in the truck of a 488. It will not let the trunk close. Had a client with that issue. Couldn't drive the car, had to make a house call. He was embarrassed when we realized what was happening.
     
    nessus-gte, tbakowsky, Llenroc and 1 other person like this.
  4. Llenroc

    Llenroc F1 Veteran
    Rossa Subscribed

    Jun 9, 2004
    5,420
    Colorado
    Full Name:
    Vern
    #4 Llenroc, Jul 12, 2022
    Just to clarify you guys mean the key is out of the ignition and inside the car?
     
  5. AEHaas

    AEHaas Formula 3

    May 9, 2003
    1,464
    Osprey, Florida
    Full Name:
    Ali E. Haas
    #5 AEHaas, Jul 12, 2022
    No actual key but rather the wireless key fob, just sitting on the passenger seat. Actually I don't even know if there is a key in there somewhere or not.

    Ali
     
    Llenroc likes this.
  6. Ferrari Tech

    Ferrari Tech Formula 3

    Mar 5, 2010
    1,201
    Georgia
    Full Name:
    Wade Williams
    #6 Ferrari Tech, Jul 13, 2022
    You didn't say what car you are talking about. Cars with keyless push to start that just have a FOB will stay awake "thinking" you intend to start the car. Keyed cars with FOBs don't do this. Having said that, I have had a couple cars lock themselves when the key was inside. So it is possible that some cars are active so to speak even if they have a key & FOB.
     
    Llenroc likes this.
  7. jacques

    jacques Formula Junior

    May 23, 2006
    877
    Los Angeles/Florida
    #7 jacques, Jul 13, 2022
    Thank you for an interesting topic..Some Chrysler models will actually start the engine just bu having tth
     
  8. jacques

    jacques Formula Junior

    May 23, 2006
    877
    Los Angeles/Florida
    #8 jacques, Jul 13, 2022
    sorry about my previous post .....the term for this is "proximity" ...think incoming mortor round. Jq.
     

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