EBC-B20H 20A Battery Capacity Tester — Lithium & Lead‑Acid, PC Control, External Charger Support

The EBC-B20H is a 20A capacity tester for lithium and lead-acid batteries featuring an integrated discharge load resistor and support for an external battery pack charger. It can automatically switch between charging and discharging and perform multi-step automated tests — up to 5 programmable steps. Each step may be set as charge (requires an external charger) or discharge to run unattended charge/discharge sequences and cycling tests. Connections use four-wire detection so the voltage measurement and current channel are wired separately to ensure high measurement accuracy. Test results are shown on the LCD display, which reports voltage, current, capacity, elapsed time and other test data. For PC integration the device requires a dedicated USB to TTL serial cable (not an ordinary USB cable). Computer control enables real-time curve plotting, calibration of measurement references, firmware upgrades and automated charge/discharge cycling via the compatible software.