I just got a pair of QuietComfort3 noise canceling headphones made by Bose as a gift. I’ve been using them for the last few hours to listen to my iPod and I can barely hear anything else going on around me, which will be great when I’m sitting on a plane near the engines. The QC3s run off a proprietary battery that goes into the right headphone. It only took about an hour to charge the battery and it should run for 25 hours off of that charge.