 When the vehicle was tested by "Commercial Motor" in 1940, it was available with five sizes of battery, rated at 128, 160, 192, 224 or 240 amp-hours, the larger sizes giving a longer range between charges.Control of the 12–15 cwt model was by a bar-type accelerator pedal, which controlled the operation of several electro-magnetic contactors.Series resistances were used to limit the current on the first two stages of the controller.