1 Use an impedance meter to test whether it is within the qualified impedance. 2 Whether the white paper such as SM/md is used for disassembly [generally yellow paper]. 3 Whether high frequency low resistance electrolyte is selected

Equivalent series resistance refers to the resistance component of an equivalent series circuit. ESR value depends on frequency and temperature and is related to the tangent of loss angle.

In the application process, electrolytic capacitors are often selected to form capacitor banks for series application or parallel application due to insufficient capacity or withstand voltage level. Under what circumstances do we need to select series or parallel connection?