Battery Capacity Tester ZB2L3 with LED Display

DescriptionError codes and their meanings:Err1: Battery voltage is above 15V Err2: Battery voltage is lower than the termination voltage Err3: Battery can not afford the load or discharge current line too much resistance Err4: Overcurrent (current exceeds 3.1A) Note: Use the resistance of the discharge process, resistive load will seriously heat, please pay attention to safety!