Comment What about the power supply powering the wireless (Score 1) 221
The wireless pad they are using still needs to be supplied with power. Presumable with one of those non-standard bricks, they are not putting 110/220V on your desk for safety reasons. So the total inefficiency should be 40-80% multiplied by the transformer efficiency.
With todays technology it is perfectly possible to standardize on one plug, that has an extra 2 pins to communicate what power it needs. A transformer that uses that technology only sees a couple of dollars price increase. Everyone wants this but no one wants to be first in adding a few dollars cost to their devices.
With todays technology it is perfectly possible to standardize on one plug, that has an extra 2 pins to communicate what power it needs. A transformer that uses that technology only sees a couple of dollars price increase. Everyone wants this but no one wants to be first in adding a few dollars cost to their devices.