A method and system for the determination of toner usage in proportion to image-feature density, with independent estimation of each color toner module consumption. In general, a gate tunnel current reducing mechanism is provided for any circuitry operating in a standby state and an active state, and is activated in the standby state to reduce the gate tunnel current in the circuitry in the standby state, to reduce power consumption in the standby state. The moving mechanism moves the nozzle and a substrate relatively to each other along the surface of the substrate. By the use of a linear drive it is possible to achieve constant velocity of movement of the plunger independent of the resistance to movement, within the predetermined limits. In one embodiment, the present invention is an automobile including an electronic accessory, a first battery connected to the electronic accessory, and a control unit connected to the first battery, the control unit monitoring the first battery and disconnecting the first battery from the electronic accessory when the first battery is in a first operational condition. The system further includes at least one DSLAM positioned in the component area of the DSLAM enclosure and an AC power supply for providing AC power to the at least one DSLAM.