Aeroplane charger?

Hi, I own an iBook and am travelling to the USA in a months time. I want to be able to use my laptop on the plane but obviously, the battery will run out on a single charge. Is there a way of charging my iBook on the plane?

Yep, you can buy special aeroplane chargers.
(Provided your airline has power outlets)...

Kensington make a universal charger that comes with aeroplane adapter, but it's a bit pricey (around 100$). But you can use it to charge nearly all electronics anywhere (plane, car, 110V 220V)