It might be easier for the reader, if we all used watts (W) when referring to power usage. Amperes (A) are useless without knowing the voltage (V). In the case

It might be easier for the reader, if we all used watts (W) when referring to power usage. Amperes (A) are useless without knowing the voltage (V). In the case of the Pi, since it runs on 5 V USB power, it was easy to calculate the wattage. But for devices of unknown voltage, amperes tell you nothing about power consumption. (For reference: a Pi at 1.2 A is using 6 W, and a Pi at 0.6 A is using 3 W.)