SMART SENSOR Battery Voltage Internal Resistance Tester High-Precision Lithium Lead Acid Battery Tester Internal Resistance/Voltage/Temperature/USB Interface/Connectable to Mobile Phone Function 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: <40A/m External Electric Field: <1V/m Suitable for Safety Regulations: IEC 61010 Power Supply: DC 3.7V lithium battery Item Size: 190 * 121 * 51mm / 7.48 * 4.76 * 2.01in Item Weight: 482g / 1.06lb Package Weight: 2200g / 4.85lb Package Size: 37 * 32 * 14.7cm / 14.56 * 12.59 * 5.78in