If you are looking for an inexpensive, powerful Qi2 power bank, the ESR power bank matches price and performance just right.

This circuit is based on a PIC16F883 that controls a simple lock-in circuit to measure in circuit the ESR and in some cases the capacitance of electrolytic capacitors ... but there is a shift in low ...

[Peter Demchenko] wanted to use a low power TS555 in an ESR meter design. The problem is, he needed to handle significant current sink requirements for cases where the capacitor under test had a ...

The AEC-Q200-compliant electrolytic polymer hybrid capacitor range sets new industry performance standards with high ripple current and low ESR. The series capacitors attain a ripple current between 3 ...