Il Mio Problema
I bought a new battery off Amazon when I got my MacBook on eBay and the battery suddenly stopped charging and would shut off immediately when unplugged.
La Mia Riparazione
Very quick and easy replacement! Didn't fix the issue but have a new battery on the way from you all.
Il Mio Consiglio
To get the flat ribbon cable back in, uses piece of scotch tape and "pull" it into place, being sure the locking clip is up.