Plane + America power supplysWatch
Not sure about planes, but in the USA they have different voltage (120v) usualy so you would need a stepup transformer so your laptop power supply gets the required 240v input. Some power supplys are auto switching which means it will detect the voltage. Check the input voltage if it says 110v-250v~ then all you need is is an american power adaptor that www.maplin.co.uk will sell. If it requires 240v then you will need a special transformer or buy an american power supply for you laptop.