My 2012 iMiEV SE also just started having battery issues. It only charges up to 12 our of 16 kWh bars. My car has 43,000 miles on it. I already created my own thread regarding my issue before I found this thread. So, I will subscribe to this thread also and follow along.
EV: 2012 Mitsubishi i-MiEV SE, Raspberry Metallic, Premium Package - Purchased 07/11/13
PHEV: 2017 Chrysler Pacifica eHybrid, Bright White, Platinum Package - Purchased 05/01/17