TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

12V Battery warning just came up with very bad timing - how long do I have?

Discussion in 'Model S' started by redox, Feb 10, 2019.

  1. dknisely

    dknisely Member

    Joined:
    Dec 4, 2016
    Messages:
    200
    Location:
    Seattle, WA
    I got that error on my December 2016 low mileage S, and when I called, they said it wasn't a big rush, but just an indication to make an appointment in the near future. I would have been nervous if I were on a roadtrip...
     
  2. iTech

    iTech Member

    Joined:
    Dec 21, 2017
    Messages:
    89
    Location:
    NJ
    If your 12V health isn't actually bad, a firmware (re)deploy will remove the alert.
     
  3. Snowstorm

    Snowstorm Active Member

    Joined:
    Dec 8, 2016
    Messages:
    1,085
    Location:
    Ontario Canada
    I wonder why Tesla didn’t go with LiIon in the first place for the 12V, a 4S cell would have similar voltage. What is the drawback? It can’t be that much more expensive as they make their own LiIon cells.
     
  4. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

    Joined:
    Mar 8, 2012
    Messages:
    13,751
    Location:
    Texas
    The main drawback is cold weather. They'd need to add an additional heating system to keep the battery above freezing. This would add weight, cost and additional vampire drain. Anyway, the 12V battery is now pretty good. Although I had a couple replaced during the first year, the current battery has been fine for five years.
     
  5. Snowstorm

    Snowstorm Active Member

    Joined:
    Dec 8, 2016
    Messages:
    1,085
    Location:
    Ontario Canada
    Lead acids can work better in the cold compared to Li-Ion?
     
  6. Snowstorm

    Snowstorm Active Member

    Joined:
    Dec 8, 2016
    Messages:
    1,085
    Location:
    Ontario Canada
  7. rooter

    rooter Member

    Joined:
    May 13, 2018
    Messages:
    183
    Location:
    Corona del Mar
    Li-Iron has no such problem. And by its nature it can not spontaneously combust.

    Oh sure it doesn't have quite the energy-density of Li-Ion, but it lasts twice as long.
     
  8. aerodyne

    aerodyne Member

    Joined:
    Nov 19, 2018
    Messages:
    131
    Location:
    Los Angeles, CA
    Factory battery is a SLA, sealed lead acid. I would be cautious about changing to another chemistry if you will be in a cold climate. For instance, lithium batts in general do not like being frozen. AGMs will work in subfreezing temps.
     
    • Like x 1
  9. Mike Robinson

    Mike Robinson Member

    Joined:
    Feb 3, 2016
    Messages:
    57
    Location:
    Atlanta GA
    Thanks!
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC