Seriously.... I purchased one of the MadsonLine EmPower adaptors ( as well as the small power supplies). I have used it on a couple of long flights (I am a pilot for Delta, and our 737-800s (First Class) and 767/777/MD11 BusinessElite seats all have EmPower), and it worked very well. I am not sure if they have the adaptors at Apple stores... I did discover that the EmPower system is designed to sustain your existing PowerBook charge, and will not charge your battery while plugged in. Neither you nor your battery will arrive refreshed, sadly. My advice to you is to start drinking heavily.... Come to think of it, you CAN buy a second battery at the Apple Store. Or, rebook on a Delta 767-300 or 777, and help support my exorbitant paycheck. Asking to use the power outlet in the cockpit (which is 115V, but I think 400 cycles, which someone else said wouldn't make a difference) is out these days, unfortunately. Whichever, have fun. Pete