Feature: 1. Applicable to A Variety of Battery Testing: Can be used for lithium batteries / lead-acid batteries / alkaline batteries / carbon batteries / button batteries and so on. 2. Temperature Measurement Function, Battery Internal Resistance Measurement: Battery internal resistance measurement: 0.000mΩ~3.100Ω (4 ranges), resolution 1uΩ. Temperature measurement: -10.0°C~60.0°C (single range). 3. Battery Voltage Measurement: Resistor voltage divider, noise filtering, ADC sampling and programmed calculation and modification to get the accurate measurement value. Voltage measurement: 0.000V~±100.00V (2 ranges). 4. Connect with Computer to Read Measurement Records: Use USB cable to connect the instrument and computer, open the software will automatically search for COM port and automatically connect, after successful connection, you can read real-time measurement values, read historical measurement records, synchronise computer time to the instrument and other functions. 5. Mobile phone APP BT Connection, Wireless Measurement and Data Browsing: Instrument and mobile phone both open the BT function, and then open the APP and connect, after successful connection can achieve wireless measurement and data browsing and other functions. (Note: The mobile phone or tablet PC system version is Android 5.0 or above, and the battery internal resistance tester APP is installed in the smart device). 6. Threshold Setting, Preset Judgment Threshold: Threshold setting interface can set the threshold for judging the test results of FAIL, WARNING and PASS, and setting the appropriate threshold can improve the efficiency of judgement to improve the efficiency of the test. 7. Large-Capacity Lithium Battery: Built-in rechargeable lithium battery power supply, energy-saving and environmentally friendly, goodbye to the tedious disassembly and replacement of batteries, save time and worry. Specification: Specifications: Model: ST9001 Material: ABS Resistance Measurement: 3mΩ, 1uΩ, ±1%fs, ±20dgt 30mΩ, 10uΩ, ±0.5%fs, ±15dgt 300mΩ, 100uΩ, ±0.5%fs, ±15dgt 3Ω, 1mΩ, ±0.5%fs, ±15dgt Voltage Measurement: 7V, 1mV, ±0.2%fs, ±10dgt 100V, 10mV, ±0.2%fs, ±10dgt Temperature Measurement: -10.0℃~60.0℃, 0.1℃, ±1.0℃ Function: Battery internal resistance measurement, battery voltage measurement, temperature measurement Noise Aavoidance Frequency: Yes, automatic frequency conversion range 920Hz~ 1080Hz Accuracy Guarantee Temperature and Humidity: 23°C±5°C, below 75%rh Internal Resistance Measurement: 0.000mΩ~3.100Ω (4 ranges) Voltage Measurement: 0.000V~±100.00V (2 ranges) Temperature Measurement: -10.0°C~60.0°C (single range) Resistance Resolution: 1uΩ Voltage Resolution: 1 mV Temperature Resolution: 0.1°C Maximum Input Voltage: DC 100V (between + and - measurement terminals), AC input not available Internal Resistance Measurement Method: 1KHz AC 4-terminal test method, open terminal voltage 3V max. Measuring Current: 2.0mA~200mA (different measuring current for different range) Temperature Measurement Method: NTC temperature sensor (10KΩ at 26°C) A/D Conversion Method: 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 the printout BT Connection: √ Hold and Store Function: with manual hold and store, automatic hold and store Measurement Judgement Function: PASS, WARNING, FAIL judgement threshold can be preset. Battery Voltage: Battery level is displayed in 5 frames, when the battery voltage is low, it reminds charging in time. Alarm Setting: √ Auto Power Off: No operation after about 15 minutes of power on. Power Consumption: 300mA MIN / 500mA MAX Working Temperature and Humidity: -10°C~40°C; below 80%RH Storage Temperature and Humidity: -20°C~60°C; below 70%RH Insulation Resistance: 20MΩ or more (500V between circuit and case) Withstanding Voltage: AC 3700V/RMS (between circuit and case) External Magnetic Field: