The 0.5A could be the maximum rating of the power supply. I could not imagine it consuming 110W (220Vrms x 0.5A), as it is just a small transceiver (and the power supply is so small)....
Let me checkout my old setup tonight....
6303:fetch:
I see, akala ko systems loss na yan.
I remember kasi in an ad. unplugging your Phone Charger when not in use for x hours will light up x homes or something.