A few days ago, I received a Parrot AR Drone for repairing someone's spyware-slathered PC. In the process of preparing it for flight, I hacked the original charger to be a balance charge lead for my professional hobby charger and replaced the battery plug with an EC3 connector. Now I have batteries that are the same size but contain 300 more milliamps of power and I can even charge the original battery on the same charger. Sweet!
Here's some test footage I took on a dreary Pittsburgh Sunday. Soon I will update the receiver to work with my Spektrum DX8 radio system for even more height. Then I'll be able to take this thing over twice as high...as long as the wind cooperates. I'm not very good at climbing trees and buildings.