The generator is driven by an electronic circuit board (the power components are cooled by forced air). Components can be readily installed in the crawler body and connected to its general circuitry. Any DC voltages within the range of 72 to 130 V can be selected and applied to the generator. An exclusive feature allows generator to operate at constant kV and mA no matter of the battery cycles. This feature ensures a stable dose output and guarentees image quality consistency all along the exposure time.