Last week we flew the Baby Clowns, 1 in particular on a 3S pack - it really scoots!  Anyhow, I just discovered today, EIGHT DAYS later That I never unplugged the battery!         

Slipped the pack into a Lipo sack for all the subsequent activity noted as follows.  Checked for voltage, there wasn't any.  Tried charging through the Triton and Equinox - got a "no battery" error.  Then tried charging directly through the power plug at a minimum charge rate.  it started to respond so I left it alone, came back in 5 mintes and it errored out for low battery voltage.      

Switched to one of the parallel chargers, the ones where it charges through the balance plug and charges all the cells to the same level independently.  Cell 3 registered, Cells 1 and 2 did not.  after a couple minutes cell 2 regustered, so I went away for awhile.  20 minutes later still no cell 1.  Plugged in the volt meter - still would not even display, I think cell 1 is a completly blocking it out.      

Have thus resigned myself to admitting I pulled a really stupid antic on this pack, and shall shed a tear for its avoidable demise.      

Sheesz, I was reallly feeling full of myself too..!