My 2014 FFE was working great and my 12V battery died on me about 2 weeks ago (unexpectedly, although to be fair, it did last 4.5 years). I had it replaced (for $260!), but now my driving range in EV mode has decreased by 10-20%. I used to be able to regularly go 20+ miles on electricity, but now can just get 16-18. I'm quite a conservative driver and haven't changed my driving pattern at all. The only things which changed are that my 12V died, and then I replaced it. Have any of you seen this or have any ideas as to what might have happened?