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Dead battery--how long to charge?


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19 replies to this topic

#1 OFFLINE   Taiwwa

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Posted 28 June 2016 - 06:47 PM

I wound up with a dead cmax battery. It is my fault. I had the fans blowing while in Park. I figured with the traction battery this thing shouldn't have dead battery problems. Guess not.

Anyways, I've been charging my battery for like half an hour and no signs of progress. Interestingly, the power seats work.

This is an SEL model with the push start.

How long is this going to take?







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#2 OFFLINE   Adrian_L

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Posted 28 June 2016 - 07:18 PM

Depends on the current.   A 2 amp trickle charger could take several hours.  I think my charger has 2, 8 or 12 amp settings.



#3 OFFLINE   Plus 3 Golfer

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Posted 28 June 2016 - 07:30 PM

Jump start with another vehicle.  Leave in ready to drive mode.  HVB via the DC-DC converter will charge the 12 V battery.  If HVB gets low, ICE will start.  Turn off all accessories.  You can drive the car if you desire.

 

I'd leave in ready to drive mode for a couple of hours.  I'd also have the 12V battery tested to ensure it will hold a charge.


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#4 OFFLINE   Taiwwa

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Posted 28 June 2016 - 07:46 PM

How do I jump start when it is push button start?

#5 OFFLINE   obob

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Posted 28 June 2016 - 10:31 PM

I wound up with a dead cmax battery. It is my fault. I had the fans blowing while in Park. I figured with the traction battery this thing shouldn't have dead battery problems. Guess not.

Anyways, I've been charging my battery for like half an hour and no signs of progress. Interestingly, the power seats work.

This is an SEL model with the push start.

How long is this going to take?

 

My experience with a "dead" C-Max battery has been no electrical activity at all, no lights, nothing.  I use a small lithium battery jumper which so far has work fine for the last 2 dead battery situations I have had.  

 

Being that your electric seats work, I wonder if there is some problem other than the battery.

 

Are you able to measure the voltage of the battery ?


Edited by obob, 28 June 2016 - 10:32 PM.


#6 OFFLINE   Taiwwa

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Posted 29 June 2016 - 05:52 AM

Not sure how to measure the voltage.

It seemed to be going good, but now the power seats don't work.

At one point I went and saw that a light could be lit up. I'm thinking maybe one of the cabin lights is left on?

#7 OFFLINE   Taiwwa

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Posted 29 June 2016 - 06:10 AM

I think I'm going to replace the battery. My car also has had this odd sulphuric smell since I got it, and I think that is because the battery might be weak.

Anything specific?

#8 OFFLINE   Plus 3 Golfer

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Posted 29 June 2016 - 06:20 AM

How do I jump start when it is push button start?

Attach jumper cables from other car to C-Max.  C-Max has positive post and ground post under the hood.  Search for pics of posts if not familiar with the location of the posts. Start C-Max normally with push button.  If you don't get "ready to drive" message, then there is likely something other than the 12 V battery wrong with car. 

 

When my 12 V battery wouldn't hold a charge, I started my car by jump starting.  I then drove it to the dealer for replacement.

 

If you have the rotten egg smell, the battery may have an internal short, overheating, and venting.  Not good as sulfuric acid can cause damage.  The battery is located under the floor of the hatch area.  Lift up the cover for the small storage area in the hatch.  You then can pull out the floor cover of the storage area to see the battery.


Edited by Plus 3 Golfer, 29 June 2016 - 06:35 AM.


#9 OFFLINE   Taiwwa

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Posted 29 June 2016 - 06:45 AM

I have a car battery charger and it is connected to the max battery. No progress it seems.

I'm just curious for the future. Normally when a max is being jumped by another car, when connected many of the electronics also work?

Will any old 12v battery do as a replacement?

#10 OFFLINE   Plus 3 Golfer

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Posted 29 June 2016 - 07:10 AM

Ford recommends using the same capacity battery as OE because of the charging / monitoring algorithms for the 12 V battery.


Edited by Plus 3 Golfer, 29 June 2016 - 07:11 AM.


#11 OFFLINE   Taiwwa

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Posted 29 June 2016 - 11:24 AM

Still no luck. This is irritating, to say the least.

I'm about to replace the 12bpv battery. Just remove cables and install anew?

#12 OFFLINE   Plus 3 Golfer

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Posted 29 June 2016 - 11:38 AM

Still no luck. This is irritating, to say the least.

I'm about to replace the 12bpv battery. Just remove cables and install anew?

 

Are you saying jump starting your C-Max doesn't work?  or that charging with battery charger isn't working?  

 

You need to make sure the replacement 12 V battery fits into the space if you are not replacing with OE battery.   The service manual also implies that the BCM needs to be reset when a new battery is installed (see my link above).   It's likely won't matter if not reset, but who knows as we don't know what the BCM algorithm does to regulate charging.



#13 OFFLINE   Adrian_L

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Posted 29 June 2016 - 11:38 AM

Unbolt the red and black cables and remove and replace.

 

Consumer reports recommends Everstart Maxx. 



#14 OFFLINE   Taiwwa

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Posted 30 June 2016 - 11:25 AM

Anyplace online I might get the battery cheaper? Though given weight, may not be any savings with shipping.

I got the car working again, but this incident made me think maybe I should replace the 12v just to be safe. The car is about four years old now, which is about the life of the 12v? And that might explain the slight sulphur smell that I get when I open the doors.

#15 OFFLINE   Adrian_L

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Posted 30 June 2016 - 11:55 AM

Have you lifted up the trunk cover and looked at the battery?

I would recommend online shopping for pretty well anything except batteries--the thing weighs 50 pounds!   Walmart, Costco, Napa....



#16 OFFLINE   homestead

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Posted 30 June 2016 - 12:00 PM

Here are instructions for changing 12v battery from the user manual.

The service manual may have better detail.

http://www.manualsli...page=220#manual


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#17 OFFLINE   obob

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Posted 30 June 2016 - 01:02 PM

Not sure how to measure the voltage.

It seemed to be going good, but now the power seats don't work.

At one point I went and saw that a light could be lit up. I'm thinking maybe one of the cabin lights is left on?

 

http://www.ebay.com/...UwAAOSwKfVXGlq4

 

or if you are willing to wait (via china) http://www.ebay.com/...kRWeMpM&vxp=mtr


Edited by obob, 30 June 2016 - 01:40 PM.


#18 OFFLINE   ptjones

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Posted 30 June 2016 - 01:30 PM

I looked into this a few years ago and 2013 OM has wrong part# for battery and I looked to see if there was a larger replacement 12v battery and there wasn't one that would fit. ;)  Here are some pics of battery compartment. Don't forget to connect to other 12v Batt. before disconnecting your 12v batt. so you don't lose all your saved memory.

Battery1
battery2
battery4

 Paul



#19 OFFLINE   WNY

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Posted 01 July 2016 - 08:56 AM

what type of charger (Amp Rating?) are you using? the smaller ones are only 1-2 amps or less, if the battery is really low, it could take many hours to get it up to a nominal voltage for the car to turn on. some of the interior lights may work, since LED's don't require much energy to come on, but other accessories or the relay to turn on the HV battery to start the car may not work until you reach a certain charge voltage. 

 

A fully charged battery should have 12.7-13.2 volts. it will charge higher than that usually 13.5-14.5 volts. 

 

if the battery has been discharged below a certain amount, it could get damaged internally or have a  bad cell, and it will never hold a good charge or even charge up.

Dealership had replaced mine when I bought the car last Aug, its a 2013 and never had a battery problem. (yet). 

 



#20 OFFLINE   cmax-nynj

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Posted 10 August 2016 - 09:33 AM

It seems only Motorcraft carries the battery but I may be wrong.  Can the 12V battery be lifted up easily from where it is located?








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