I can't provide you with the precise numbers, but I can say that when I ran a test with a laptop, I was getting 6,200 H/S and the battery was slowly draining even while charging on an 85 Watt power supply.  ...so, at least 85 Watt/hours or 262KHWH (kilo-hash-watt-hours)

That sort of shenanigans is likely to burn up an $90 power supply in a few months so that should be factored into your net.