Feature:1. LARGE SCREEN LCD DISPLAY: Battery internal resistance tester has a 3.2in 55x57mm TN HD LCD screen, the large screen is easier to read, and the resistance and voltage range are automatically switched; The internal resistance and voltage of the battery are measured and displayed simultaneously, which is more attractive than the traditional single screen display2. UNPRECEDENTED RANGE: Battery analyzer voltage range 0.00V~120V, internal resistance range 0.000m~500, resistance six ranges automatic switching. One instrument includes the measurement of all batteries from 0 to 3000AH within 120V, and there is no need to purchase multiple devices to measure the internal resistance of the battery3. UNIQUE ACCURATE MOTION MEASUREMENT DESIGN: The internal resistance tester adopt 1KHz AC low resistance measurement technology and noise reduction technology, without disconnecting the connection, can be measured in the running state of the measured object, and the four line testing method is connected and measured to avoid the influence of wire resistance and contact resistance, which greatly improve the test accuracy. Self developed CPU design, possess higher integration and more stable performance. Also support user self calibration for improved accuracy4. EASY TO USE DESIGN: Battery tester does not need to distinguish between positive and negative terminals when using, plug and play. Equipped with universal DB9 interface design, which is convenient for users to connect to various battery general test equipment. Also has a battery screening function, convenient for users to batch battery classification or pairing5. EXCELLENT MATERIAL: Automotive battery tester adopt TPR(thermoplastic rubber) and ABS comprehensive protection, beautiful appearance and environmental protection, thickened material make fall and pressure resistant, not easy to erosion damage, improve the service life by 300%6. INTIMATE DESIGN: Car battery tester has a backlit screen display, LED flashlight lighting on the top, 1250mAh lithium battery power supply(with USB C charging cable), maximum sustainable working time of 10 hours, environmental protection and practical, even in the dark environment can work normally, user friendliness greatly improved7. APPLICABLE TO VARIOUS TYPES OF BATTERIES: The battery internal resistance tester is a handheld tester specially designed for the measurement of various types of batteries, including acid batteries, lithium batteries, alkaline batteries, etc. Not only suitable for the battery measurement of motorcycles, cars, trucks, boats, saloons, ships, etc., but also suitable for AA, AAA, Li ion, button batteries, 6F22 and other small batteriesSpecification:Item Type: Battery Internal Resistance TesterProduct Model: IR500Screen: 3.2in TN HD LCD screen, automatic shutdown functionBattery Range: Acid battery, lithium battery, alkaline batteryVoltage Range: 0.00V~120VInternal Resistance Range: 0.000m~500Maximum Input Voltage: DC120V(do not need to distinguish between positive and negative electrodes), cannot input ACCurrent Range: 50mA~50uA ACMeasurement Speed: 3 Times/secondMeasurement Signal Frequency: 1KHzVoltage Range Test: Automatic or manual selectionResistance Range Test: Automatic or manual selectionTest Method: 4 line Kelvin testing methodUser Self calibration: SupportedAutonomous Factory Recovery: SupportedLighting Function: SupportedBattery: 1 x 1250mAh rechargeable lithium battery, maximum working time 10 hours.Package List:1 x Main Unit1 x USB Cable2 x User Manual