The battery internal resistance tester can measure the internal resistance and voltage of the battery at the same time. It adopts a Kelvin four-wire test clip, which can better avoid the influence of contact resistance and wire resistance, and can perform more accurate measurements. This product adopts intelligent control, LCD display, and implanted Kalman filter mathematical algorithm. It has the advantages of high precision, high efficiency, low cost, light weight, energy saving and environmental protection. Built-in 1000mAh lithium battery, 5V charging, Android mobile phone charger can be used, very convenient. This product is widely used in various battery production, maintenance, testing, scientific research laboratories and other occasions. It can also be used to measure the AC resistance of capacitors and low-resistance high-precision resistance. Parameters Test parameters:AC resistance, DC voltage Measurement accuracy: Resistance:0.5% Voltage:0.5% Measuring range: Resistance:0.001mΩ ~ 200Ω Voltage:0.001V ~ ±100VDC Signal source; Frequency: AC 1kHz Current: 2mΩ/20mΩ range 50mA; 200mΩ/2Ω range 5mA; 20Ω/200Ω range 0.5mA Range: 6 ranges automatic and manual 3 ranges automatic and manual Test speed:5 times/sec Correction: Resistance: each range is individually and manually calibrated without affecting each other Voltage: each range is individually calibrated manually, and does not affect each other Factory settings: Save the factory information, one key can restore the factory state Energy saving settings: about 10 minutes delay, automatic shutdown without any operation Applicable scope: Cell phone, computer, electric vehicle and other battery maintenance, battery factory inspection and testing Show results:LCD display Power supply:Built-in lithium battery, using 5V/1A charger Size:166*80*28mm(L*W*H)