OK so i'm going to be going on a trip, a rather long one since i'm in Southern California, to London in a few months. I was wondering what things i'd need while I'm there. I have no idea if the UK has different power outlet configurations than the US and I definitely DON'T want to be stuck there with no way to charge my MBP. I've also heard of some things that will allow you to charge/run your laptop off the power plug built into the armrest of most airline seats. What would you suggest? Also if there are any other things you can think of please post them! Thanks!