Battery Drains after 24-48 hours in garage

[ELGIN KENNY]

My 12V battery continues to drain if left for 1-2 days. Currently it's been sitting 22 hours voltage has gone from 12.6 to 10.76 Dome lights stopped going on when I opened the door after first 4 hours. Dealer returns vehicle and says 12V battery is fine , no codes no issues. Can't duplicate issue. Anyone have ideas? I deleted Ford app. Is this possible battery is draining normal rate for a hybrid ?

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[Traegorn]

That is definitely not normal. I park outside, and it took a solid week of me letting the truck sit unused in subzero temperatures just to not have the dome light come on.

I'd take it to a different Ford dealer.

 

[ELGIN KENNY]

Thanks, I took it to a different dealer already and they said same thing . I guess I'll try a 3rd dealer

 

[2seater]

Old school is to remove one battery cable and connect an ammeter inline to see if there is an abnormal parasitic draw. At least it would quantify what's going on.

 

[bbyBlue]

Mine drains faster then my ranger did. I am caulking it up to a bad battery or wakened one from sitting on the train for about 2 months after being built
I am guessing they put the battery in there drove it 2 miles to the train and sat there

 

[rlhdweman]

I'm not sure how the hybrid charges its battery, but I have had vehicles do this from a bad diode in the alternator.

 

[ELGIN KENNY]

TY for all the ideas. I was tracking it last day ahead it just died after 22 hours in Garage My NOCO fired it back up immediately. Dealer says .005 parasitic draw so supposedly not the issue. Going to remove battery cable and then test battery voltage in the morning to try to see if its weak or bad battery even though 2 dealers say battery checked out . Never thought of diode in alternator TY again for the support everyone and ideas

 

[OneAlienBoi]

My 12V battery continues to drain if left for 1-2 days. Currently it's been sitting 22 hours voltage has gone from 12.6 to 10.76 Dome lights stopped going on when I opened the door after first 4 hours. Dealer returns vehicle and says 12V battery is fine , no codes no issues. Can't duplicate issue. Anyone have ideas? I deleted Ford app. Is this possible battery is draining normal rate for a hybrid ?

We've let our hybrid sit for over a week at times with zero issues. But I've heard this is an issue with earlier build hybrids.

 

[jewc75]

The battery is a known issue. Take it in to the dealer and tell them they need to replace the battery.

 

[Driverdown13]

My 12V battery continues to drain if left for 1-2 days. Currently it's been sitting 22 hours voltage has gone from 12.6 to 10.76 Dome lights stopped going on when I opened the door after first 4 hours. Dealer returns vehicle and says 12V battery is fine , no codes no issues. Can't duplicate issue. Anyone have ideas? I deleted Ford app. Is this possible battery is draining normal rate for a hybrid ?

Well my question is do you get a notification that your truck is in deep sleep mode because my hybrid is driven once every two to three weeks maybe? Usually after about a week I get the notification that the truck is in deep sleep mode. Most of the time I just disregard it and the truck sits sometimes I start it and the notification goes away that is the correct function of the vehicle but I’ve never had to jump the truck it’s always started. So I definitely find another dealer I’m not a mechanic but something is wrong I’ve had my maverick for almost a year and that’s the function of my hybrid.

 

[TedTX]

Move key fob from range or inside something completely metal to block signal. Worse thing is to carry keys on your person and just moving around. Hybrids wake up early to pressure gas and throw on the relays BEFORE you unlock truck.

 

[ELGIN KENNY]

Ok I'll put them in a metal box , TY, I just disconnected negative terminal from battery going to check in the morning and see if they battery is draining on its own

 

[ELGIN KENNY]

Mine drains faster then my ranger did. I am caulking it up to a bad battery or wakened one from sitting on the train for about 2 months after being built
I am guessing they put the battery in there drove it 2 miles to the train and sat there

Ya I know men was sitting there weeks/months waiting to come north

 

[SR-71]

There is no alternator on the hybrid. 12V battery is charged by DC-DC convertor from the HV battery.

 

[KeinoDoggy]

My 12V battery continues to drain if left for 1-2 days. Currently it's been sitting 22 hours voltage has gone from 12.6 to 10.76 Dome lights stopped going on when I opened the door after first 4 hours. Dealer returns vehicle and says 12V battery is fine , no codes no issues. Can't duplicate issue. Anyone have ideas? I deleted Ford app. Is this possible battery is draining normal rate for a hybrid ?

Mine did the same thing. Since I'm retired and do not drive as much anymore. my hybrid would sit in the garage for 3-4 days at a time. When I would go out and open the door, no lights and no display on the dash or infotainment screen. I would put it on the trickle charger and that would fix it until the next time.

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