We charge a capacitor up and time its discharge to a certain level while running the circuit. Then we repeat it using resistors instead, until we match the dis

We charge a capacitor up and time its discharge to a certain level while running the circuit. Then we repeat it using resistors instead, until we match the discharge rate exactly. Then measure the resistor and do I=V/R, using the midpoint V. That accounts for all the surges and eliminates most error sources, giving you a nice and extremely realistic average current draw.