As for charging it on a plane, I have two of these....
http://www.amazon.com/Kensington-Battery-Extender-Charger-iPhone/dp/B0018DKODQ
They work pretty well. You charge 'em up via USB in advance, then plug 'em into the phone and it gives another 3-4 hours of juice.
http://www.amazon.com/Kensington-Battery-Extender-Charger-iPhone/dp/B0018DKODQ
They work pretty well. You charge 'em up via USB in advance, then plug 'em into the phone and it gives another 3-4 hours of juice.