New battery for Mac Book Pro
5 - 10 Minuten
Battery wasn't keeping a charge for very long so I was keeping it plugged in all the time.
It was a piece of cake, I had read the directions a couple of times and they were so clear I didn't need to refer back to them while I was doing the job
To keep the screws straight to put them back in the right holes (They are different lengths and sizes) I put them just outside of the laptop next to the right hole