Hi all. I'm considering a temporary upgrade to a newer MBP, and would be putting my current MBP (4 years old this month) away, for about a year. The battery still gets me around 3 hours, which, for this model is close to 100%. While the computer won't be used much, it will occasionally be used in the guest room. What's the best way to store this laptop battery for a year? Do I just leave it plugged in, on a desk, or do I take the battery out and sit on a shelf, partially discharged, and let it drain over time?