Powering a laptop on an aeroplane?

[partygirluk]

I have seen mention of a device which allows you to power your laptop from the sockets on the arm rest of your aeroplane seat. Does anybody know any more about this?

[Browny]

Airplane Adapters (http://www.priorityelectronics.com/laptop-airplane-adapter.htm)

[kenberman]

not all planes have this power device in your seat