We had a freak sudden winter storm here in CT last week which caught all drivers off guard. I left work early as did most everyone else it seemed to beat the storm, but that wasn't the case. Ended up in stop/go traffic for 3 hours with all electical accessories running. (lights, heater, rear defroster, wipers). Up until this time, I have Never in 3 years, 25K miles had the battery guage ever gone down more than 3 bars for any reason. After about 2 hours, I noticed the SOC down to 1/2 for the first time ever. I was able to make it home with about 1/2 charge left. My problem/question is: I have since been able to get SOC back to 100% where it normally is, but the slightest assist will drop SOC 1/4 or more instantly. It then will recharge slowly back to 100% The car has never acted this way before and I'm wondering if some damage was done to the battery pack or is the IMA experiencing some type of recal? Definitely not acting normally.....Any ideas?