Originally Posted by Glenn collins
Sorry being tick.... Can you explain
Often the manufacturer will state the power consumption rather than the current draw.
Power (P, measured in Watts) = Current (I, measured in Amps) x Voltage (V, measured in Volts)
So if the stated peak power consumption is, say 24 W, then the current draw is 24 (W) / 12 (V) = 2 Amps.
If it is a low power draining device (or on standby) it might describe the power as say 180 mW, [i.e. 0.18 W].
The current is then 180 (mW) / 12 (V) = 15 mA = 0.015 A
Does that make more sense?