File the widened ‘polarization tip’ off the one prong of the plug so it’ll plug into the 220 V. British (round prong) tip adaptor ok. Use the brown extension cord not only to bring the electric closer to you (in rooms that only have 1 plug for the whole room), but also to multiply the plug so you can charge your a) laptop, b) PDA, c) digital camera all from the same cord. Many rooms will have only one plug. You won’t want to have to decide which unit to charge.