this may sound like a dumb question, but can you use your MBP without the battery with the power adapter plugged in? i use my laptop almost exclusively on a desk nowadays and battery capacity has drained significantly. if i could not use the battery unless i'm actually using it away from power, i'd be able to preserve the battery's capacity. reason i asked the question http://www.engadget.com/2008/11/22/macbook-and-macbookpro-suffer-performance-anxiety-once-the-batt/ thanks!!