How to measure EDLC’s Leakage Current

（1）The supercapacitor to be tested should be fully discharged before testing the leakage current, generally for more than 1 h;

（2）Apply rated voltage across the capacitor U_R;

（3）After the super capacitor voltage reaches the rated voltage UR, measure the voltage across the series protection resistor

Calculate leakage current：

*Leakage current (mA);

U_V：Voltage across the series resistance (V);

R：Series protection resistance, generally 1000 Ω and below.

Leakage current test circuit diagram

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