1. Nov 30, 2019 #1
   

   stacey burke Active Member

   I have had the 12 v battery drain when I used the Acc mode and had to jump the car. I understand that. What I don't understand is this morning I got up and unplugged my car from the 240 v charger and the car was at FULL CHARGE (100%) but the 12 v battery was so low the car would not start. Why if I'm plugged in is the 12 v not fully charged?

    
To remove this ad click here.

2. Nov 30, 2019 #2
   

   craze1cars Well-Known Member

   12v battery may have been damaged by previous deep discharge. I’d replace it.

    
3. Nov 30, 2019 #3
   

   KentuckyKen Well-Known Member

   Kentucky

   From many posts, it appears that the 12 V battery is only charged when the car is on, not off or ACC.
   A single deep discharge while not good for the battery is not likely to kill it. Take it to most any auto parts store and they will test the battery for free Ana then you’ll know.

    
4. Nov 30, 2019 #4
   

   Sandroad Well-Known Member

   Michigan

   ^^^^^This. New battery time.

    

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in