Apple Computers instructions said to use a phillips screwdriver. It was indeed a pentalobe. The TS01 Pentalobe screwdriver I had was TOO SMALL. It was for the mobile devices; not a Macbook Pro!
The repair went very smoothly after receiving the 2009 MacBook Pro Battery 5-Point Pentalobe Screwdriver from IFIXIT.
I can fix it with the help of IFIXIT!