Description: 【High Accuracy and Wide Range】: The Tester is a handheld high accuracy battery internal resistance meter with a voltages measurement range of 0-±100V (DC) and resistance measurement range of 0-200Ω. It offers automatic, 1V, 10V, and 100V voltages levels and automatic, 20mΩ, 200mΩ, 2Ω, 20Ω, and 200Ω resistance levels with an accuracy of ±0.5%. 【Multifunctional】: This Lithium Battery Internal Resistance Tester allows manual adjustment of voltages and resistance ranges. It features a sorting mode that automatically good and bad batteries based on user set thresholds. It also supports historical records and exports historical measurement data tables. 【Efficient Sorting and Comparison】: With set values for eight groups of voltages/resistances, it can instantly complete batch screening of quality batteries or accurate location of problem batteries to significantly improve work efficiency. Suitable for testing various types of batteries including lithium batteries, lead batteries, carbon batteries, etc, as well as mobile phone batteries. 【Data Records and Clear Display】: Test records are automatically retained and can be exported for analysis when connected to a computer. The device uses a clear screen for clear visibility of function data making it easier to read. 【Specification】: Made from premium PP material ensuring durability with dimensions measuring 15.9cmx8.1cmx2.9cm. Size Chart: 15.9cmx8.1cmx2.9cm/6.26inchx3.19inchx1.14inch Package Includes: 1 Lithium Battery Internal Resistance Tester 1 Clamp Test Line 1 Type C Data Cable 1 User Manual 1 Packaging Box Note: Please allow slightly errors due to manual measurement and different packages.