I got a 2017 and been logging battery capacity for its whole life. In June 2022, the car still have around 24Kwh usable capacity (from the original 29.2KWh usable). 2nd week of September I start to see a huge degradation ( I was able to use around 12Kwh). Dealer diagnose unable to balance battery cell : they change the onboard charger early January ... And still got only 12kWh of usable capacity but the wrench (that indicate a problem) has disappear.
Dealer said that I still can see all of the cell in the battery report, has anyone ever heard of this kind of problem?
Any hint is welcome since the battery capacity is not guaranty by Ford ....
The car has around 141000Km, the modem upgrade has been done and I drove it until it stop near my house to exclude a bad guessometer.