1. Product Overview
The ANENG BT82 Battery Tester is a specialized tool designed for measuring the performance of starting lead-acid batteries in vehicles. It offers accurate measurements and multiple functions for comprehensive battery analysis, including vehicle starting, charging, and power load tests. Its simple operation and exquisite design make it a reliable device for maintaining battery health.
Key Features:
- Universal Compatibility: Suitable for all standard lead-acid batteries, including ordinary, AGM tablet, AGM wound, EFB, and GEL batteries (12V and 24V).
- Multiple Detection Functions: Tests battery start capability, start system load, maximum load, and charging system.
- High Precision: Utilizes a four-line system measurement method with a self-developed core circuit and software algorithm for accurate results. Includes powerful protection and a "line clip contact bad" reminder for safer operation.
- Versatile Application: Ideal for cars, recreational vehicles, ships, touring cars, electric vehicles, and other daily life tools requiring battery condition monitoring.
- User-Friendly Display: Features a large LCD digital display with backlight for clear viewing.
- Flashlight Function: Press and hold the ESC button to activate the built-in LED flashlight for use in dim lighting conditions.
- Voice Prompts: Provides voice value and reminding functions, allowing users to obtain measurement results without constantly observing the screen.
- Language Switch: Supports switching between Chinese and English.
Video: Overview of the ANENG BT82 Battery Tester and its features.
2. Setup and Connection
- Prepare the Battery: Ensure the vehicle's ignition is off and the battery terminals are clean and free of corrosion.
- Connect the Tester:
- Connect the RED clamp of the BT82 tester to the POSITIVE (+) terminal of the battery.
- Connect the BLACK clamp of the BT82 tester to the NEGATIVE (-) terminal of the battery.

Image: ANENG BT82 Battery Tester with its red and black clamps, ready for connection to a 12V-24V universal battery.
The tester will power on automatically once correctly connected. If the connection is poor, the device may provide a "line clip contact bad" reminder.
- Select Language:
Upon initial use or if you wish to change the language, navigate to the language selection menu. Choose between Chinese and English, then press the 'OK' button to confirm your selection.

Image: The BT82 display showing the Chinese/English language selection option.
3. Operating Instructions
The BT82 offers various testing modes to assess different aspects of your vehicle's battery and electrical system. Use the 'OK', 'ESC', Up, and Down buttons to navigate the menu and select options.

Image: Detailed view of the ANENG BT82 Battery Tester's control panel, highlighting the Up, Down, OK, and ESC buttons, and the red positive and black negative terminals.
3.1. Battery Quick Test
This mode provides a rough determination of the battery's cold start current based on its capacity. It's a quick way to get an initial assessment of the battery's health.

Image: The BT82 display showing results from a Battery Quick Test, including voltage, State of Charge (SOC), State of Health (SOH), and internal resistance.
3.2. Accurate Battery Test
For a more precise evaluation, input the accurate cold-start current parameters (e.g., CCA, DIN, JIS, IEC) of the battery under test. The tester will then provide a detailed judgment of the battery's condition.

Image: The BT82 display prompting for input of accurate cold-start current parameters (CCA, DIN, JIS, IEC) for an Accurate Battery Test.
3.3. Cranking Test (Start System Load)
This test assesses the vehicle's starting ability. After ignition, the tester displays the starting voltage. A test value showing the starting voltage higher than 9.6V (e.g., 14.24V) indicates good starting ability.

Image: The BT82 display showing results from a Cranking Test, including static voltage and starting voltage, indicating the health of the starting system.
3.4. Max Load Test
To perform a maximum load test, navigate to the 'Max Load Test' option in the main menu. Follow the on-screen prompts, which may include instructions to increase engine speed (e.g., up to 2.5K-3K rpm) and press 'OK' to proceed.

Image: The BT82 display showing the 'Max Load Test' menu option and instructions to increase engine speed for the test.
3.5. Charging System Test
To test the charging system, select the 'Charge System' option from the main menu. The tester will guide you through the process, which may involve increasing engine speed to a specified range (e.g., 2.5K-3K rpm) and pressing 'OK' to initiate the test.

Image: The BT82 display showing the 'Charge System' menu option and instructions to increase engine speed for the test.
3.6. Flashlight Function
To activate the built-in LED flashlight, press and hold the 'ESC' button. This feature is useful for illuminating battery terminals or working in dimly lit environments.

Image: The BT82 Battery Tester with its flashlight on, highlighting the bright digital display for easy viewing.
4. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the BT82 in a dry, cool place away from direct sunlight and extreme temperatures when not in use.
- Cable Care: Inspect the test leads and clamps regularly for any signs of damage or wear. Replace if necessary.
- Battery (Internal): The device is powered by the vehicle battery during testing. No internal user-replaceable batteries are mentioned for the device itself.
5. Troubleshooting
- "Line Clip Contact Bad" Reminder: If this message appears, ensure that the red and black clamps are securely and correctly attached to the positive and negative battery terminals, respectively. Clean any corrosion from the battery terminals if present.
- No Display/No Power:
- Verify that the clamps are connected to a 12V or 24V battery.
- Check for secure connections to the battery terminals.
- Ensure the battery itself has sufficient charge to power the tester.
- Inaccurate Readings:
- Ensure battery terminals are clean.
- Confirm that the correct battery type and parameters (e.g., CCA) are entered for accurate tests.
- Make sure the battery is at a stable temperature for testing.
6. Specifications
| Feature | Specification |
|---|---|
| Brand | ANENG |
| Model | BT82 |
| Product Name | Battery Tester |
| Application | 12V / 24V Lead-Acid Batteries (Ordinary, AGM Tablet, AGM Wound, EFB, GEL) |
| Screen | LCD Digital Display with Backlight (77mm / 3in screen size) |
| Flashlight | LED Bright Light Beads |
| Language | Chinese / English Switch |
| Material | ABS |
| Item Dimensions (L*W*H) | 158.6 * 83.6 * 29.6 mm / 6.24 * 3.29 * 1.16 inch |
| Package Dimensions (L*W*H) | 205 * 138 * 76 mm / 8.07 * 5.43 * 2.99 inch |
| Package Weight | 405g / 14.28oz |
| DIY Supplies | Electrical |
| Origin | Mainland China |
| Certification | CE |

Image: Dimensional drawing of the ANENG BT82 Battery Tester, showing its physical measurements.
7. Package Contents
- 1 * ANENG BT82 Battery Tester
- 1 * User Manual (English)

Image: The ANENG BT82 Battery Tester and its included English user manual.
8. Warranty and Support
Specific warranty details are not provided in this manual. For warranty claims, technical support, or further assistance, please refer to the product packaging or contact the seller/manufacturer directly.
General support information often includes:
- Manufacturer Contact: Check the product packaging or the manufacturer's official website for contact details.
- Retailer Support: For purchases made through a retailer, contact their customer service for assistance.
- Online Resources: Look for FAQs or support sections on the ANENG official website.





