A battery-changing vehicle includes a mobile carriage, a frame disposed above the mobile carriage, and a boom assembly connected to the frame. The voltage and current sensors are operable to receive voltage and current signals representative of voltage and current provided to the load and generate measurements signals therefrom. The positioning pawl is pivotally mounted about a positioning pawl pivot axis to operatively engage at least one positioning abutment of the positioning member. A PC is instructed through a connection line to establish USB connection. The bulged portions are preferably created by a coining process and facilitate binding mechanically the band to the buckle. When the printing control unit is activated, it can receive the chart data and the quality assurance data, and control a printing unit to emulate the chart recorder for executing chart recording.