Features: HW586 battery capacity tester discharge type 1.2-12V external load capacity of the battery and other tests 18650Tools, single-function, by controlling the load off and get real-time integrated discharge current capacity results Most support 15V 3A discharged through the discharge voltages and current, itself do not discharge Most capacity statistics support 9999Ah (9999000mAh) Automatically identify and develop appropriate battery termination voltages can also be manually adjusted Note:Use the resistance of the discharge process, resistive load will seriously heat, please pay attention to safety! This circuit voltages in order to improve the measurement accuracy, when the terminals displays nothings then a small voltages do not affect the actual measurement, if you is shorting the input terminals (absolute 0V) will show 0If the battery is connected in reverse, it may damage the circuit switching tube when the load is connected and the load current is high (about>0.8A)!! Specifications: Component:Plastic Size:Approx.50x37mm/1.96x1.45inch Power supply voltages: DC4.5-6V Operating Current: less than 70mA Discharge voltages:1.00V-15.00V 0.01V resolution Termination voltages ranges: 0.5-11.0V Supported by current: 3.000A 0.001A resolution Most voltages measurement error: 1%+0.02V Most current measurement error: 1.5%+-0.008A Most battery capacity ranges: 9999Ah (1Ah=1000mAh) Package Includes: 1pc Battery Tester (with Screws) note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.