It can vary a lot with battery charge. Using Solo as an example, typical currents are about two Amps. With a fresh battery, 8.4 Volts, this is 16.4 Watts. But at say 3.6 Volts per cell, 7.2 Volts total the current will have dropped to (7.2/8.4) times the original, now 1.7 Amps (down about...