Newer now makes an external battery charger that can charge two MacBook Pro batteries at once. This new Intelligent Battery Charging Station is great. I got it and setup was very easy. Basically just plug it into the wall and place your batteries on it. One of the two slots has a "Recondition" button that actually drains your battery and recharges it for you. This is a good thing to do every now and then even for your Lithium ion batteries. Another good use for this charger besides being using it home is using it when you attend a seminar. Often times wall power is not very accessible from your seat. However, you can go plug the charger in at the wall and charge one battery (or two) while you have one in your MacBook Pro. The Newer Tech Intelligent Battery Charging Station goes for $149.95 at OWC. Newer Tech also makes them for MacBooks, iBooks and PowerBooks too.