Hi All, I will soon be studying abroad and I'll only be bringing my Macbook Air with me. That leaves my rMBP sitting at home for a few months... My question is regarding storing Macs for long periods of time. I've heard before you're supposed to store your Mac when it has ~50% battery, is this true? Are there any other concerns or measures I should take when storing my Macbook for a few months? (around 4 months to be exact) I appreciate the help!