In this Eleshop video, we explain what battery internal impedance is, why it’s important, and how to measure it accurately. We demonstrate two popular battery testers: the Fnirsi HRM-10, which is an affordable option suitable for small businesses, and the Hioki BT3554-51, a professional-grade tester designed for high precision and automated measurements.
You’ll learn what internal impedance means and how it affects battery performance, why a regular multimeter cannot measure internal impedance correctly, and how testers use a 1 kHz AC signal combined with a 4-wire measurement for precise results. We also show real demonstrations with both testers, so by the end of this video, you’ll know exactly how to test your batteries like a professional.
