Hello all, I have a Macbook MacBook (13-inch, Mid 2009) with a Intel core 2 duo and 4 GB of ram. I am looking at either selling this unit then replacing it with a newer MBP (used) or fixing the following issues. 1. replacing the battery The current battery is done and holds charge for about 20 minutes. I was hoping you guys could point me in the right direction on a replacement battery. 2. Swapping out the hard drive to a SSD If anyone has done this on a laptop this old was it worth the upgrade?