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Guest Message by DevFuse

Get you C-MAX Energi Registered in the official Ford Authorized Registry. More here.

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2013 67K miles original battery

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4 replies to this topic

#1 OFFLINE   fredf


    New Member

  • C-MAX Energi Member
  • Pip
  • 57 posts
  • Region:Decline
  • Locationdenver
  • My C-MAX:2013
  • Current Vehicle:CMAX Energi

Posted 13 September 2018 - 04:26 AM

I don't want to Jinx myself but I know a lot of people have issues with their 12V batteries.  My CMAX has 67,000 miles about 1/2 EV due to a lot of highway driving I have had zero issues with the 12V battery, I have never done anything other than check on  it 2-3 times a year.


I think the fact that I have about a 50/50 mix of EV and IC  is what has helped the most and the car is garaged at night

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#2 OFFLINE   Levi Smith

Levi Smith

    Energi Member

  • C-MAX Energi Facebook
  • PipPip
  • 969 posts
  • Region:U.S. Northeast
  • LocationUpstate NY
  • My C-MAX:2013
  • Current Vehicle:2013 C-Max Energi 303A W Panoramic Roof

Posted 13 September 2018 - 05:44 AM

There shouldn't be any difference to your 12V battery charging as to whether you are in EV mode or having the ICE started...  The 12V battery charging doesn't care, it all comes from the big battery any time the car is "ON", or from the EVSE when charging and some times before/after that.

#3 OFFLINE   dontfret


    New Member

  • C-MAX Energi Member
  • Pip
  • 439 posts
  • Region:U.S. Pacific Coast
  • LocationUnited States
  • Current Vehicle:CMAX Energi

Posted 13 September 2018 - 09:16 AM

WARNING!!  Your 12V battery is the size of a motorcycle battery and has a 36 month warranty. When it goes the car will appear totally dead - you can''t charge the EV battery (since it requires the 12V to fire the relay on the car inverter that begins charging), open the doors with the electric lock or remote, or start the car.  You can jump it like a 'normal' car using the + and - electrodes in the front engine compartment, but if the car is locked you'll need to use your mechanical key that's inside the fob to open the door and hood.  So if that's truly the orginal 12V battery, congratulations on your longevity, and get thee to a replacement.

#4 OFFLINE   GS Dave

GS Dave

    New Member

  • C-MAX Energi Member
  • Pip
  • 186 posts
  • Region:U.S. Southern Atlantic
  • LocationJupiter, FL
  • Current Vehicle:2013 C-Max Energi

Posted 18 September 2018 - 09:03 AM

MIne lasted about 4.5 years and 80K+ miles...but was a biotch when it died.  Replace before you need to.

#5 OFFLINE   jzchen


    Energi Member

  • C-MAX Energi Platinum Member
  • 561 posts
  • Region:U.S. Pacific Coast
  • LocationArcadia, CA
  • My C-MAX:None
  • Current Vehicle:2018 Honda Clarity PHEV

Posted 19 September 2018 - 08:52 PM

If you check on it 2-3 times a year you’re doing a lot better than I did.

That’s all you need to do in my opinion. We got a no start issue when ours died. Wasn’t as severe as others I guess...

Edited by jzchen, 19 September 2018 - 08:53 PM.

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