Going to replace the battery while I have it opened too.
Just need to learn how to clone the drive.
Much of my machine’s slow down was actually from the HD. Program crashes, spinning beach balls all went away with the new SSD. As I said, it was like getting a new computer.
Thanks for the info. I like my MBP, hate the new ones(but that’s another story).
The HDD died, I sent it off to repair. They installed a 1T, 5400 rpm . It boots like an old Windows machine, sloooow.