I honestly do not know much about the computer other than it struggles to keep a charge when not plugged in. It is great condition, works perfectly fine and will stay charged even off the charger just not as long as a typical computer/ Mac. I am upgrading my companies computers to new Macs so I have a few that have to sold.

Here is the Apple spec link: https://support.apple.com/kb/SP794?viewlocale=en_US&locale=en_US