In a general sense, booster ratio can refer to any system that uses a device to amplify or increase the power or effectiveness of another component. This can include mechanical or electrical systems where a smaller input force or power is used to produce a larger output force or power, such as in hydraulic jacks, pneumatic cylinders, or electric motors. The booster ratio is typically expressed as a ratio of the output force or power to the input force or power, and is an important factor in determining the overall efficiency and performance of the system.