The unibody case had been bent from a fall. The battery was not fully recharging.
Fine, but I didn't do it. I hired someone to do the repair.
I tried to replace the top part of Macbook Pro but had to hire someone to do it after I failed.
MacBook Pro 15" Unibody (Mid 2009) Upper Case and Trackpad
MacBook Pro 15" Unibody (Mid 2009-Mid 2010) Replacement Battery