I walked away since there were two warning flags: manufacturer date of 4/2013 and 11/2 bars.
That's one warning flag, not two. A few people here keep getting this wrong, and the wrong info then floats around like a cold virus, but
ONCE AGAIN:
January through MARCH builds in 2013 use the old battery chemistry.
BEGINNING IN APRIL the newer chemistry was used, and it's fine. I drive an April 2013 build with 12 bars,
Cwerdna drives one too. The change happened IN APRIL, not after April.
Cwerdna thinks it's unclear exactly what day it happened, but I believe that since we have seen no April builds losing capacity too fast, and no March builds that don't, that the change was implemented April 1, 2013. Sort of an April Fool's Day joke in reverse...