YR1035+ 4-Wire Digital Lithium Battery Internal Resistance Tester High Precision Internal Resistance Test Instrument 100V for Ni-MH Ni-CD Li-ion Battery Feature: 1.Advanced Measurement Technology: This lithium battery internal resistance tester employs a true 4-wire AC sine measurement, effectively suppressing the impact of test leads and contact resistance. This assures you of accurate and reliable readings, making it a vital tool for precise electrical measurements. 2.Functional Interfaces: The internal resistance test instrument comes with two functional interfaces, supporting battery sorting functions. This feature provides a streamlined process for battery management, making it a convenient tool for various electrical tasks. 3.Built-in Battery and Power-Saving: This battery internal resistance meter features a built-in battery and supports mobile power bank charging. With its low power consumption and numerous power-saving options, it ensures long-lasting performance, reducing the frequency of recharging. 4.Wide Range of Resistance Measurements: The battery internal ohm meter supports testing up to 200 ohms, with a minimum resolution of 0.01 milliohms and less than 5 milliohms. By pressing the HOLD button, the ZR function is activated to measure small internal resistances as low as 0.30-0.50 milliohms. 5.Versatile Battery Compatibility: The true 4-wire 1KHz AC sinebattery ohmmeter operates within a range of 0.00001 ohm to 200 ohms. It can test a variety of batteries including lead-acid, lithium-ion, lithium polymer, iron phosphate lithium, alkaline, nickel-hydrogen, nickel-cadmium, button batteries, and more. With the ZR function, measurements below 5 ohms are even more accurate, ensuring precise internal resistance readings. Specification: Certification: CE Origin: Mainland China DIY Supplies: ELECTRICAL Material: ABS Battery: 1 * Lithium battery, 2000mAh (included) Precision format: (precision percentage+least significant digit) Range: 20m /200mm /2 /20 /200 Maximum resolution: 0.01m /0.1m /1m /0.1 Accuracy: 0.7%+7/0.5%+5/0.5%+5+0.5%+5/0.6%+5 Display method: 22.00m (when ZR function is enabled)/22.0m /2200 /22.00 /220.0 Within the gear range of 5% -95%, when not within this range (less than 5% of the gear range or greater than 95% of the gear range), the error may be greater than the above accuracy. Voltage measurement: (% reading+% range) Range: 1V/10V/100V Maximum resolution: 0.00001V/0.00001V/0.001V Accuracy: 0.15+0.15/0.15+0.10/0.15+0.015 Display mode:. 999999 V/9.9999 V/99.999 V Positive and negative symmetry error (0.012%+5 words) Temperature drift within normal operating temperature range (10 -40 ) 100ppm/ Maximum voltage between any terminals: 100V Display: Internal resistance number: 2000 counts Voltage number: 99999 counts Updated 4 times per second Temperature: Working temperature: 10 -40 , storage temperature: -20 -60 Internal resistance temperature coefficient: 0.1 * (specified accuracy)/ (<18 or>28 ) Power consumption: <60mA (within a range of 200m and above, when the power supply is 3.7V, the backlight is turned off) <120mA (20m range, backlight turned off when power supply is 3.7V) 10mA (entering low-power mode) 0mA (shutdown) Product size: approximately 120.00x60.00x20.00mm Product size: 4.72x2.36x0.79inch Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Package Included: 1 x Tester 1 x 2 in 1 Probe 1 x English Manual