EBC-B20H is a battery pack capacity tester for battery capacity test in the range of 12V-72V, built-in discharge load resistor, support charger for external battery pack, automatic switching charge and discharge, support computer online drawing curve .  Parameter:  EBC-B20H12-72V battery pack tester  Power supply mode: AC 100-240V  Voltage setting |: 9.00-88.00V, minimum step 0.01V  Discharge current: 0.50-20.00A, minimum step 0.01A (up to 10A for 12V battery pack)  Test mode:         DSC (discharge mode), constant current discharge, automatic stop when the voltage is lower than the set termination voltage        CHG (charge mode), charged by an external charger, automatically stops when the current is lower than the set termination current  Voltage measurement: 0.10-89.00V, accurate to 0.01V, error ±0.5%  Current measurement: 0.10-20.00A, accurate to 0.01A, error ±0.5%  Capacity measurement:       Within 10Ah, resolution 0.001Ah       10Ah-100Ah, resolution 0.01Ah       Above 100Ah, resolution 0.1Ah  Wiring method: four-wire detection, voltage measurement and current channel separate wiring to ensure measurement accuracy  LCD display: test data such as voltage, current, capacity, time, etc.  Computer connection:        Dedicated USB to TTL serial cable (not ordinary USB cable)        Computer control, drawing curves, calibrating measurement benchmarks, upgrading device firmware, cycling charge and discharge, etc.    Package Included:     1x tester     1x online line     1x power cord     1x test clip pair            Battery interface: connect the battery pack to be tested     Charger interface: Connect the charger that matches the battery to be tested. When the tester is set to the charging mode, the charger is connected to the battery for charging. The tester detects the charging current. When the current is less than the set termination current. It is judged to be full and stop charging. (The tester does not control the charging current and voltage, only for detection and on-off control).     Automatic charging and discharging: The tester supports up to 5 steps, each of which can be charged (requires an external charger) or discharged. The charge and discharge test can be performed automatically by setting multiple steps.