Originally Posted by economyman
You have to bring your own. The type you need is an empower adaptor, or just get an empower power supply from iGo, Targus, and a range of other makes. These can typically power your laptop in the plane, car, and from a regular power outlet. The iGo I have can also power PDAs, mobile phones, MP3 players, etc. (with the correct optional accessories).
Looking at the iGo range at the minute to save me trailing cables away is the iGo Juice70 Universal Home/Office & Auto/Air Notebook Power Adapter suitable for use on BA flights .
Cheers