I'm not saying to never charge or use it , but rather not to do it "blindly" One MUST know what is going on with each cell before proceeding. I'd also not say to throw it away , but rather don't throw it away "blindly" again one MUST know about each cell.
Over the years there seemed to be 2 camps.
One has always said to blindly charge it in series , the other has always said to toss it blindly. I guess I am in both/neither which is to say I'd like to check it out first before deciding what to do with it.