Feature: 1. Applicable Range: This battery tester supports internal resistance, voltage, and temperature testing, suitable for various battery, including lithium battery, carbon battery, and button cell, with a wide range of applications. 2. Measurement Range: The battery internal resistance range is 0.000mΩ‑3.100Ω (4 levels), with 1uΩ resolution, the temperature range is ‑10.0‑60.0℃ (single range), and the voltage range is 0.000V to ±100.00V (2 levels). 3. High Accuracy Measurement: This battery tester adopts resistance voltage division, filters out noise, and ADC samples to obtain accurate measurement values through program calculation and modification. 4. Multiple Functions: Connect the meter and computer using a USB cable. After opening the software, it will automatically search for the COM port and connect, realize functions of reading real time measurement value, historical records, and synchronizing computer time to the meter. 5. Threshold Setting: In the threshold setting interface, thresholds can be set to determine whether the test results are FAIL, NARNING, or PASS. Setting appropriate thresholds can help improve judgment and testing efficiency. 6. Built in Battery: This tester has a built in rechargeable battery with 2500mAh large capacity design, providing lasting endurance. No need to frequently disassemble and replace battery, which is energy saving and eco friendly. Specification: Item Type: Battery Tester Product Material: ABS Battery: 1 x Polymer Battery 2500mAh (Built in) Type Range Maximum Display Resolution Accuracy Measuring Current Resistance 3 mΩ 3.100mΩ 1uΩ ±1%fs. ±20dgt. 200mA 30mΩ 31.00mΩ 10uΩ ±0.5%fs. ±15dgt. 200mA 300mΩ 310.0mΩ 100uΩ ±0.5%fs. ±15dgt. 20mA 3Ω 3.100Ω 1mΩ ±0.5%fs. ±15dgt. 2mA Voltage 7V ±7.100V 1mV ±0.2%fs. ±10dgt. 100V ±100.00V 10mV ±0.2%fs. ±10dgt. Temperature -10.0-60.0℃ 60.0℃ 0.1℃ ±1.0℃ Function: Battery Internal Resistance Measurement, Battery Voltage Measurement, Temperature Measurement Avoidance Noise Frequency: Yes, Automatic Frequency Range 920Hz-1080Hz Accuracy Guarantee Temperature and Humidity: 23±5℃, below 75%rh Internal Resistance Measurement: 0.000mΩ-3.100Ω (4 levels range) Voltage Measurement: 0.000V-±100.00V (2 levels range) Temperature Measurement: -10.0-60.0℃ (single range) Resistance Resolution: 1uΩ Voltage Resolution: 1mV Temperature Resolution: 0.1℃ Maximum Input Voltage: DC100V (between + measurement terminal and - measurement terminal), not support AC input Internal Resistance Measurement Method: 1KHz AC 4 terminal test method, open circuit terminal voltage 3V maximum Measurement Current Method: 2.0mA-200mA (different range for different measurement current) Temperature Measurement Method: NTC Temperature Sensor (10KΩ at 26℃) A D Conversion Mode: Successive Approximation Type Display Update Frequency: 5 times per second Response Time: 200ms Measurement Time: About 2 seconds USB Interface: With USB interface, stored data can be uploaded to the computer, save and print Hold and Storage Function: Manual Hold and Storage, Automatic Hold and Storage Measurement and Determination Function: Pre set PASS, NARNING, and FAIL determination thresholds Battery Voltage: 5 levels battery power display, low battery voltage reminder, timely charging Alarm Setting: Yes Automatic Shutdown: Shut down automatically after about 15 minutes without work Power Consumption: 300mA Minimum, 500mA Maximum Voltage: AC3700V/RMS (between circuit and housing) External Magnetic Field: <40A/m External Electric Field: <1V/m. Package List: 1 x Tester 1 x Testing Clamp 1 x Temperature Probe 2 x Keys 1 x USB Cable 1 x CD 1 x User Manual 1 x Aluminum Case