MacBook Pro Retina Display Late 2013 issues?

Hello,

so I purchased a MacBook Pro a month ago which is the base Retina model (4GB Ram, 128 GB SSD) but I exchanged it yesterday with the medium model (8GB RAM, 256GB SDD) and when I came back home, I noticed that the OS version read 10.9 but the worst thing was that the MacBook did not turn on, the battery was completely dead, so I had to plug it in and charge it first, but is that really usual that Apple Products' batteries are drained?? Now I do own an iPad, iPhone, and the MacBook Pro that I exchanged with this one, and none of them had Zero (0) Battery life when first turning it on, all of my Apple devices came with at least 70% battery!

Well that is not the issue alone, after I plugged it in, I turned it on, and was setting it up, just like any other new Apple first use product, and before I get to put my Apple ID, the screen goes completely black, Duh!! so I had to press the Power button again, and the screen came back on to the previous screen!

I am sorry that my question is pretty long or my explanation is long, but I am really worried. Now I do appreciate that Apple let me exchange it even after the 14 days period has ended but I do not want a defective Mac, since I paid $1499.99

Please let me know if I have to go and replace it back, since it came with an old version of OS X (10.9) not (10.9.2) so I am assuming that it might've been a refurbished one that they gave me so they get rid of it! Or it was sitting for a long time without getting sold basically.