First off I'm sorry for making a new thread there probably is a load of these on here. Anyway, I am moving to England next week and just got a 2nd hand iphone 3gs. It's only a year old. I've never owned an iphone before so I have no idea on what their battery life is like. I'm going to be travelling for 24 hours straight. I only want to listen to music and MAYBE watch a movie or two if I get really bored on the plane. I have two 2200mah rechargeable battery packs as well. Will this be enough to get me to england? thanks in advance for any help!