The Autel AutoLink AL539B is a 2-in-1 OBD2 scanner and 12V battery tester — the only tool you need to diagnose check engine lights AND test your car battery health. Compact, easy to use, and built for DIY drivers who want professional results without the shop bill.

⚡ Highlights — Two Tools in One

• Full OBD2 code reader + 12V battery tester combined in one device
• Instantly read & clear check engine light fault codes
• Test battery condition, charging system & cranking system

🔋 12V Battery Tester — Know Before You're Stranded

• Test 12V car batteries from 100–1700 CCA
• Checks battery health, charging voltage & starter motor performance
• Detects weak or failing batteries before they leave you stranded

📟 Easy-to-Read Avometer Display

• Built-in digital multimeter (avometer) for electrical system testing
• Measures voltage, current & resistance with clear on-screen readouts
• No guesswork — color-coded results make diagnosis simple

📡 Full OBD2 Functions — Complete OBDII Code Reader

• All 10 OBD2 test modes: I/M readiness, O2 sensor, EVAP, freeze frame & more
• Read & erase DTCs to turn off check engine light
• Works on all OBD2-compliant vehicles (1996 & newer, US/EU/Asian)

🚗 Widespread Vehicle Coverage

• Compatible with 80+ US, European & Asian vehicle brands
• Supports cars, SUVs, light trucks & minivans from 1996 onward
• Automatic vehicle identification for fast, accurate results

🔍 DTC Lookup — Understand Every Code

• Built-in DTC library with definitions for thousands of fault codes
• No internet or phone required — look up codes right on the device
• Helps you understand the problem before visiting a mechanic

🔑 Access to VIN, CIN & CVN

• Retrieve Vehicle Identification Number (VIN) automatically
• Access Calibration ID (CIN) & Calibration Verification Number (CVN)
• Essential for emissions testing & compliance verification

🖐 User-Friendly Design — Plug In & Go

• No batteries needed — powered directly via OBD2 port
• Ergonomic handheld design with intuitive button layout
• Multilingual menu support for global users

One tool. Two jobs. Zero guesswork. The Autel AL539B OBDII code reader and battery tester is the smart choice for any DIY car diagnostic — save time, save money, and stay in control of your vehicle's health.