Autel AL539B: Full OBDII Scanner with Battery Tester Review

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Autel AL539B is an OBD2 scanner that not only offers basic features like CEL, I/M readiness, and O2 sensor test but also lets you test the car’s battery.

The scanner comes with a built-in multimeter and a battery tester to check voltage and perform a circuit test.

It’s an ideal scanner for beginners and DIYers as it’s very easy to use thanks to the one-click I/M readiness option that lets you check different monitors’ readiness status.

Autel AL539B OBDII Scanner with Built-In Multimeter and Battery Tester
Car owners and DIYers who want to check their battery voltage more often can get Autel AL539B scanner. This corded device helps determine minor faults as well.

Let’s first check out how it compares to other battery testers.

Autel AL539B vs. Autel AL539 vs. Autel AL519 Comparison Chart

Autel AL539B
Autel AL539B
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Autel AL539
Autel AL539
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Autel AL519
Autel AL519
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Customer Rating
PriceAutel AL539B  priceAutel AL539 priceAutel AL519 price
Product Dimensions74.8" x 31.5" x 102.4"7.8" x 4.1" x 1.5"
Item Weight4.15 pounds2.3lbs2.05lbs
CEL Reset
Full OBD2 Functions
I/M Readiness
Live Data, Freeze frame
DTC Lookup Library
In-Build Multimeter
Starter Test and Charging Test
Circuit Test
In-Build Battery Tester
ABS, SRS Codes
Here's where you can get an in-depth review of the Autel AL539B
If you’re looking for the an in-depth review of the Autel AL539B, this is the right place

Autel AL539B Detailed Review

Autel Autolink AL539B is suitable for people who drive more often or in rough conditions. These circumstances have a drastic effect on the car’s battery and other components.

The battery may weaken over time and stop working correctly. This condition can cause problems with the ignition system and make it difficult to start the car. This scanner can help you identify problems with the battery to ensure your vehicle works smoothly.

While this is the scanner’s biggest strength, it offers many other unique features as well.

Let’s get to know more.

Special Features

Read And Clear CEL

Engine light trouble codes are the most common trouble codes. The light won’t go off unless the issue is fixed. Autel AL539B helps to read these codes and erase them by pinpointing the problem and helping you fix it.

This feature can help save money by letting you fix small faults by yourself and save trips to the mechanic.

DTC Definitions

The scanner reads check engine light codes accurately and explains the code displayed on the screen, which is an excellent feature as it lets you determine minor faults in your car without looking for explanations.

Live PCM Data Stream:

It supports a live PCM data stream that lets you compare different parameters to identify abnormal values. This information can help you determine where the problem is.

Freeze Frame:

Freeze Frame is a valuable feature that lets you take screenshots when an error occurs. You can share these screenshots with others to find more information about an error.

Emission Tests:

You can perform various emission-related tests such as the I/M readiness test, o2 sensor test, and onboard monitor test.

O2 Sensor Test:

This test determines fuel efficiency to help you understand vehicle performance. It checks the oxygen present in the exhaust to help you determine the overall status of your car.

Extra Testing Functions

Battery Test:

If you own a vehicle that has a 12V battery, then Autel AL539B will let you perform load-free tests on it. The scanner comes with two probes, the red probe is connected to the positive terminal, and the black probe is connected to the negative terminal of the battery, with the other ends connected to the scanner.

The rest is a super easy process as the instructions flash on the scanner’s screen.

The normal battery temperature is 12.6 volts. If the battery tester shows a voltage of 12.6, your battery is good. Anything between 12.6 and 12.2 indicates a half-charged battery.

If the scanner shows a number below 12.6, it means the battery has discharged.

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Electric Tests:

Autel AL539B has a pre-equipped AVO meter that can test voltage in components.

All you have to do is place the probe on the component/circuit and note the current.

It can measure the flow of current between 20A to 200 A. However, make sure to use only a 3.7 lithium battery to power the AVO meter. Using a different battery may cause the scanner to get damaged.

This scanner can help you check the voltage in both AC and DC.

Charge Test:

This test can help you determine the alternator output from – no load to when you add loads. It displays low, normal, and high output ripple results on the screen.


  • Voltage result is shown in the form of waves and is easy to comprehend.
  • There’s no connection dropout.
  • Supports all 10 OBD2 modes.
  • There’s a built-in speaker in the scanner.
  • Data is recorded/playback and can be printed via PC.
  • The cord is pretty long and the unit is light in weight hence easy to handle.


  • Not very good at performance when used on German cars.
  • Lack of advanced features.

Who Should Buy It?

Autel AL539B works with all 1996 and newer vehicles that are OBD2 compliant. Car owners and DIYers who want to check their battery voltage can get the Autel AL539B scanner more often. This OBD2 Scan Tool helps determine minor faults as well.

The Bottom Line

Autel Auto Link AL539B can be an excellent choice for users who want to perform battery tests. It’s relatively easy to use and also works very fast.


• What is the difference between the models AL539B and AL539?

Both scanners are nearly identical, with one huge difference. AL539B offers a battery test while AL539 doesn’t.

• Is there any use for the volt/ohm graphing? What’s the screen time frame?

The volt/ohm/ampere function is quite handy. This OBD2 scanner lets you measure AC voltage and display frequency, and duty cycle on the screen. Moreover, you can also look at the oxygen sensor output signal through the OBD connection.

• Can you test a reductive heater circuit? Can you turn a circuit on and off?

It will help test a heater circuit. However, it won’t turn a circuit on and off because it’s not a scan tool.

• Does the scanner show live data?

Yes, the scanner shows PCM data stream, o2 sensor test value, and freeze frame data.

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Read more: Best Autel Scanners Honest Review 2021

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