1. Product Overview
The AUTOOL BT460 is a versatile car battery tester designed for 12V and 24V battery systems. It provides quick and accurate measurements of the battery's cold cranking amps (CCA), overall health status, and effectively diagnoses common issues within the starting and charging systems. This device offers simple and precise test results to help users assess battery performance and identify potential problems.
A key safety feature of the BT460 is its reverse polarity protection, which prevents damage to both the tester and the vehicle's battery in case of incorrect connections.

2. Setup and Connection
Before operating the AUTOOL BT460, ensure the vehicle's ignition is off and the battery terminals are clean and free of corrosion.
- Connect the Tester: Connect the red alligator clip to the positive (+) terminal of the 12V or 24V battery. Connect the black alligator clip to the negative (-) terminal of the battery.
- Power On: The tester will automatically power on once correctly connected to the battery.
- Initial Screen: The device will display the AUTOOL logo and then present the main menu with various test options.

3. Operating Instructions
The AUTOOL BT460 offers four primary testing functions: Battery Test, Cranking Test, Charging Test, and Maximum Load Test. Navigate the menu using the direction buttons and confirm selections with the 'OK' button.
3.1. Battery Test
This function assesses the overall health of the battery.
- From the main menu, select 'Battery Test'.
- Choose the type of battery to be tested (e.g., Regular-Flooded, AGM Spiral, AGM Flat Plate, EFB, GEL).
- Select the appropriate test standard (e.g., CCA, IEC, EN, DIN, SAE, JIS) and the battery's rated CCA value.
- The tester will perform the test and display results within a few seconds, including State of Charge (SOC), Voltage, Current, and Resistance, along with a 'Life' percentage and overall status (e.g., 'Good').


3.2. Cranking Test
This test evaluates the vehicle's starting system.
- From the main menu, select 'Cranking Test'.
- Follow the on-screen prompts to start the engine.
- The tester will analyze the cranking voltage and display the results, indicating the starter system's performance.
3.3. Charging Test
This test checks the vehicle's charging system (alternator).
- From the main menu, select 'Charging Test'.
- Follow the on-screen prompt to start the engine.
- Increase the engine speed to approximately 2500 RPM for 5 seconds.
- Press 'OK' to continue. The tester will display a graph of the charging voltage and indicate the charging system's status.
3.4. Maximum Load Test
This test assesses the battery's ability to handle electrical loads.
- From the main menu, select 'Max Load Test'.
- Turn on all available electrical appliances in the car (e.g., headlights, air conditioning, radio).
- Start the car engine.
- Press 'OK' on the tester. The device will measure the battery's performance under load.
3.5. Language Selection
The BT460 supports 14 languages for user convenience.
- From the main menu, select 'Languages'.
- Use the direction buttons to scroll through the available languages: English, Spanish, German, French, Russian, Portuguese, Chinese, Turkish, Japanese, Thai, and Korean.
- Press 'OK' to select your desired language.

4. Maintenance
4.1. Software Upgrade
The AUTOOL BT460's software can be updated to ensure optimal performance and access to new features.
- Connect the device to a computer using a USB data cable via its Type-C interface.
- Visit the official AUTOOL website to download the latest software update tool and firmware.
- Follow the instructions provided with the software update tool to complete the upgrade process.

4.2. Cleaning and Storage
- Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Store the tester in a dry, cool place away from direct sunlight and extreme temperatures.
- Ensure the alligator clips are clean and free of debris before storage.
5. Troubleshooting
5.1. No Power
- Check if the alligator clips are securely connected to the battery terminals.
- Ensure the battery has sufficient voltage (above 8V) for the tester to power on.
- Verify that the battery terminals are clean and free of corrosion, which can impede connection.
5.2. Incorrect Readings
- Ensure the correct battery type and CCA rating are selected in the tester's menu.
- Check for loose connections at the battery terminals or between the clips and the tester.
- Make sure the battery is fully charged before performing tests for most accurate results.
5.3. Reverse Polarity Protection
The AUTOOL BT460 is equipped with reverse polarity protection. If the clips are connected incorrectly (red to negative, black to positive), the device will not power on or function, preventing damage to both the tester and the battery. Correct the connections to proceed.
6. Specifications
| Feature | Description |
|---|---|
| Model | AUTOOL BT460 |
| Operating Voltage | 12V / 24V |
| Display Screen | 2.8-inch HD Color Screen |
| Test Standards | CCA, IEC, EN, DIN, SAE, JIS, OTHER SPECIES |
| CCA Range | 30 - 1700 CCA |
| Supported Battery Types | Regular-Flooded, AGM Spiral, AGM Flat Plate, EFB, GEL |
| Languages | English, Spanish, German, French, Russian, Portuguese, Chinese, Turkish, Japanese, Thai, Korean (14 total) |
| Interface | Type-C for software upgrade |
| Dimensions (H x W x D) | 152mm (5.98in) x 82mm (3.22in) x 30mm (1.18in) |
| Certification | CE |


7. Warranty and Support
7.1. Product Warranty
All AUTOOL products purchased from an authorized store come with a 3-year warranty. This warranty covers manufacturing defects and ensures product reliability.

7.2. Customer Support
For any inquiries or technical assistance, please contact AUTOOL customer support. All emails will be answered within 24 hours.
8. User Tips
- For the most accurate battery test results, ensure the battery is fully charged before testing.
- When performing the Cranking Test, make sure the engine starts successfully to get a complete reading.
- During the Charging Test, maintaining 2500 RPM for the specified duration is crucial for accurate alternator assessment.
- Always double-check the selected battery type and CCA rating to match your vehicle's battery specifications.
- Keep the tester's software updated to benefit from the latest features and improvements.
9. Package Contents
The AUTOOL BT460 package includes:
- 1x AUTOOL BT460 Car Battery Load Tester
- 1x Connecting Clip (alligator clips)
- 1x User Manual






