Just got a new battery for my MBP. Battery is at about 50% out the box. For cycle count, should I fully charge the battery now or let it die down and then charge? Does it matter first time around? One thing I learned the hard way is to fully charge the battery and then let it die down to about 20% or so before you charge it again. Are there any other tips anyone can share? I went to the energy saver preferences but really didn't see anything major. Thoughts?