Battery internal resistance tester can simultaneously measure battery internal resistance and voltage, this tool with four-wire test clamp can better reverse the impact of contact resistance and wire resistance, can carry out more accurate measurement. This tool is an essential tool in daily maintenance, come and try it, it will not let you down. Characteristics: The battery internal resistance tester can simultaneously measure the battery internal resistance and voltage. Wide Applications: This product is widely used in various battery production, maintenance, testing, scientific laboratories and other occasions. It can also be used to measure resistor AC resistance and low resistance with high precision. This tester adopts intelligent control and large display, also with built-in 1000mAh lithium battery to ensure long working time, it can be charged on time. Portable size and easy to carry, you can take it with you anywhere. This product supports serial ports, and the resistance measurement ranges are 0,0001mΩ~200Ω, and the voltage measurement ranges are 0,0001V~±100V DC. Technical data: Material: ABS Type: Type1: Probe Tester Speed: 5 times/second Adjustment: Correction for resistance and voltage separately Basic accuracy: Resistance: 0,5% Voltage: 0,5% Measuring ranges: Resistance: 0,0001mΩ~200Ω Voltage: 0,0001 V ~ ± 100 V direct current Resistance ranges: 6 automatic and manual ranges Voltage ranges: 3 automatic and manual ranges; Battery: 1 * Lithium battery, 1000 mAh (included) Package Weight: 250g/8.8oz List of things to pack: Type 1: 1 * tester 1 * Probe