A power device comprises a buzzer, a control unit, and a driving circuit. The control unit records a plurality of PWM frequencies corresponding to various pitches, and is configured to generate a PWM signal according to an alert sound corresponding to a de...

A method for intuitive quantification of battery discharge balancing quality and a battery management system using the same are provided. The method comprises the following steps: calculating a battery discharge balancing index (B_DQ); and determining whet...