I have a 2014 ford fusion energi. I went on vacation for 10 days over the Christmas break and left the car plugged in our non heated garage. In early January upon my return we got some cold nights in Toronto. My battery charging kept going down from 35 km to 31 to 28 to 26 whether I plugged in at home or the office (not in garage). However, I put it down to the extreme cold snap. On January 7 I got a red wrench while out driving while on my way to dinner. I parked at the restaurant and came out an hour later. The car would not start - even though I had gas and 12 km showing on my battery charge. I received a red triangle not to drive and call dealership. Start button would just flash green. I had it towed to the dealership. The dealership had it for 3 weeks as the part - the heater for the batteries was not working - they didn't have a part at ford and had to go directly to supplier and thus the lower km. I picked it up yesterday - yes they had it for 3 weeks which didn't sit well with me especially since I am leasing it. I plugged it in overnight last night and the battery only charged to 24 KM. My question is could the batteries be permanently damaged during the cold snap due to the faulty heater? Thank you.
