Pretty sure it's Empower, which means this cable should work for you:
http://www.amazon.com/Monster-Cable-...1291338&sr=8-9
Though I'd also suggest getting an external battery pack like this one:
http://www.proporta.com/F02/PPF02P05...725&t_mode=des
It's not uncommon for the power outlets to be defective, and by carrying your own power source you can recharge and power without relying on the airline.