YR1030 Battery Internal Resistance Tester, DIY Lithium Battery High-Precision Upgrade18650 Battery Testing Machine Specification: Product name: Battery Internal Resistance Tester Model: YR1030 Basic accuracy of resistance: 0.5% Basic voltage accuracy: 0.5% Resistance measurement range: 1uΩ~200Ω Voltage measurement range: 0.1mV~±100VDC Test signal frequency: AC 1KHZ Test signal current: 20mΩ-50mA, 200mΩ/2Ω-5mA, 20Ω/200Ω-0.5mA Serial port: The instrument can only be connected to the computer for communication after the instrument is turned on. It is closed by default. The baud rate is 115200 Resistance range: automatic and manual range Voltage range: automatic and manual range Display update: 5T/S Energy saving setting: 10MIN delay, automatic shutdown without any operation Charging power supply: built-in 1000mAh lithium battery, charging with 5V/1A charger Language: Chinese/English can be switched Size: 166x80x28MM Feature: 1. Large screen digital display 2. Soft plastic wrap 3. Aviation connector, nut is fixed, the connection line does not fall off 4. Built-in lithium battery, standby for up to one year 5. Equipped with three test accessories to meet different measurement needs Package included: 1x Battery Tester 1 x Kelvin clip 1 x Probe 1 x Battery holder