That sounds like way too much. It's more likely it makes use of DC power at 5V or 12V: the fact it has an integrated adapter from AC to DC only means it's harde

That sounds like way too much. It's more likely it makes use of DC power at 5V or 12V: the fact it has an integrated adapter from AC to DC only means it's harder to figure this out. A first AC/DC adapter I grabbed has an input of 0.1A at 230V and output of 0.5A at 10V. If your device has got a similar ratio (there is nothing to say it does, though :)), you are looking at 3A at 5V or 15W max.