ZB2L3 battery capacity tester discharge type 1.2-12V external load capacity of the battery and other tests 18650. Tools, single-function, by controlling the load off and get real-time integrated discharge current capacity results.Maximum support 15V 3A discharged through the discharge voltage and current, itself does not discharge.Maximum capacity statistics support 9999Ah (9999000mAh). Automatically identify and develop appropriate battery termination voltage can also be manually adjusted. Power supply voltage: DC4.5-6V (micro-USB connector). Operating Current: less than 70mA. Discharge voltage: 1.00V-15.00V 0.01V resolution.Termination voltage range: 0.5-11.0V. Supported by current: 3.000A 0.001A resolution. Maximum voltage measurement error: 1% + 0.02V. Maximum current measurement error: 1.5% + - 0.008A. Error codes and their meanings:Err1: battery voltage is above 15V. Err2: battery voltage is lower than the termination voltage. Err3: Battery can not afford to 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!.This circuit voltage in order to improve the measurement accuracy, specially designed DC bias, when the terminal displays nothing then a small voltage does not affect the actual measurement, if you are shorting the input terminals (absolute 0V) will show 0 Instructions:1. The first test should be fully charged battery.2. Connect the battery to be tested positive to positive input, a negative input to the negative, can not be reversed (with load reversal may damage the circuit)! Load connected to the output of the positive and negative output, to work through the tester micro-USB power supply (not available desktop or laptop USB powered), then the battery voltage. Direct