1. Introduction
The KONNWEI KW650 battery tester is an advanced diagnostic tool designed to quickly and accurately assess the health of 6V and 12V batteries in motorcycles and cars. This device is an upgraded version featuring a 2.4-inch color screen and a unique pattern design, making it a professional and user-friendly solution for battery issues. It supports Battery Health Test, Battery Cranking Test, and Battery Charging Test, along with alternator working status checks. The KW650 provides graphical voltage monitoring and offers lifetime free software updates.
2. Key Features
- Advanced Testing: Supports Battery Health Test, Cranking Test, and Charging Test for comprehensive battery analysis.
- Wide Compatibility: Suitable for 6V motorcycle batteries and 12V car batteries, including ordinary lead-acid, AGM flat plate, AGM spiral, GEL, and EFB batteries.
- Measurement Standards: Covers 9 battery standards including CCA (100-2000), BCI (100-2000), CA (100-2000), MCA (100-2000), JIS (26A17-245H52), DIN (100-1400), IEC (100-1400), EN (100-2000), and SAE (100-2000).
- Color Screen Display: Features a 2.4-inch color screen for clear and intuitive display of test results.
- Graphical Results: Provides graphical battery test results and U-I waveform display for detailed analysis.
- Data Management: Allows storage and review of test results directly on the device.
- PC Connectivity: Enables printing of diagnostic reports via PC connection.
- Lifetime Free Updates: Supports free online software updates for continuous improvement and compatibility.
- Multi-language Support: Offers interface in Chinese, English, German, French, Japanese, Korean, Dutch, Russian, Spanish, Italian, Portuguese, and Polish.
- High-Performance Chip: Equipped with an imported STM32103VCT6 Chip for reliable performance.

Figure 2.1: Overview of the KONNWEI KW650's main menu and supported functions.
3. Package Contents
Please check the package carefully for the following items:
- 1 x KONNWEI KW650 Auto Diagnostic Scanner
- 1 x Mini USB Cable
- 1 x User's Manual
- 1 x Colorful Box
- 1 x Nylon Bag

Figure 3.1: Contents included in the KONNWEI KW650 package.
4. Specifications
| Parameter | Value |
|---|---|
| System Voltage | 6-16 Volts |
| Input Voltage Range | 6V-16V |
| Internal Batteries | Not required |
| Operating Temperature | 0℃ - 50℃ (32℉ - 122℉) |
| Storage Temperature | -20℃ - 70℃ (-4℉ - 158℉) |
| CCA Range | 100-2000 CCA |
| AH Range | 12-200 AH |
| Certifications | CE, RoHS |
| Origin | Mainland China |
| Dimensions (approx.) | 14cm (5.5") H x 8cm (3.14") W x 2cm (0.78") D |

Figure 4.1: Physical dimensions of the KW650 device.
Supported Battery Standards and Ranges:

Figure 4.2: Detailed table of battery standards and their corresponding test ranges.
| Measure Standard | Test Range |
|---|---|
| Cold Cranking Amps (CCA) | 100-2000 CCA |
| International Electrotechnical Commission (IEC) | 100-1400 CCA |
| Europe-Norm (EN) | 100-2000 CCA |
| Deutsche Industrie-Norm (DIN) | 100-1400 CCA |
| Cranking Amps (CA) | 100-2000 CCA |
| Battery Council International (BCI) | 100-2000 CCA |
| Marine Cranking Amps (MCA) | 100-2000 CCA |
| Society of Automotive Engineers (SAE) | 100-2000 CCA |
| Japanese Industry Standard (JIS) | 26A17-245H52 |
5. Setup and Initial Use
5.1 Connecting the Tester
- Ensure the vehicle's ignition is off and all accessories are turned off.
- Connect the red positive (+) clamp of the KW650 to the positive (+) terminal of the battery.
- Connect the black negative (-) clamp of the KW650 to the negative (-) terminal of the battery.
- The tester will automatically power on once connected to the battery.

Figure 5.1: Proper connection of the KW650 clamps to a car battery.
5.2 Language Selection
Upon first use or after a reset, you may need to select your preferred language:
- From the Main Menu, navigate to 'Setup' using the arrow keys and press 'ENTER'.
- Select 'Language' from the Setup menu.
- Choose your desired language (e.g., English, German, French, Spanish, etc.) and press 'ENTER'.

Figure 5.2: The language selection screen showing various supported languages.
6. Operating Instructions
The KW650 features a user-friendly interface with a Main Menu that provides access to various testing functions. Use the ▲ (Up) and ▼ (Down) arrow keys to navigate through menu options, 'ENTER' to confirm a selection, and 'ESC' to go back to the previous screen.

Figure 6.1: The KW650 device showing the main menu and navigation buttons.
6.1 Battery Test
This function checks the overall health of your battery.
- From the Main Menu, select 'Battery Test' and press 'ENTER'.
- Choose 'In-Vehicle' if the battery is installed in the vehicle, or 'Out-of-Vehicle' if it's removed.
- Select the battery type (e.g., Regular Flooded, AGM Flat Plate, GEL, etc.) and press 'ENTER'.
- Select the appropriate test standard (e.g., CCA, EN, JIS) and press 'ENTER'.
- Enter the battery's rated value (e.g., CCA rating) and press 'ENTER'.
- The tester will perform the test and display the results, including State of Health (SOH), Internal Resistance (R), Cold Cranking Amps (CCA), and Voltage (VOL). The result will indicate 'Good Battery', 'Good, Recharge & Charge, Retest', or 'Replace & Bad cell, Replace'.

Figure 6.2: Battery test interface showing battery type selection and a sample result of 'SOH 100% Good Battery'.

Figure 6.3: Visual indicators for battery health status: Good Battery, Good (Recharge & Retest), and Replace (Bad Cell).
6.2 Cranking Test
The Cranking Test analyzes the actual cranking voltage and cranking time to help you quickly determine the overall state of the vehicle's cranking system.
- From the Main Menu, select 'Cranking Test' and press 'ENTER'.
- Follow the on-screen prompts to start the engine.
- The tester will display the cranking voltage and time, indicating if the cranking system is normal or requires attention.

Figure 6.4: Explanation of the Cranking Test and its purpose.
6.3 Charging Test
The Charging Test helps analyze the output voltage of the generator, the rectifier diode, and the charging current to provide an accurate assessment of the charging system.
- From the Main Menu, select 'Charging Test' and press 'ENTER'.
- Follow the on-screen instructions, which may include running the engine at specific RPMs.
- The tester will display the charging system's performance, indicating any potential issues.

Figure 6.5: Explanation of the Charging System Test and its diagnostic capabilities.
6.4 Waveform Detection
The KW650 offers a one-click waveform detection feature for 6V motorcycles and 12V cars, providing a visual representation of voltage fluctuations.
- From the Main Menu, select 'Waveform' and press 'ENTER'.
- The device will display the U-I waveform, which can be used for advanced diagnostics.

Figure 6.6: Waveform detection screen showing voltage over time.
6.5 Review Test Results
You can review previously stored test results on the device.
- From the Main Menu, select 'Review' and press 'ENTER'.
- Navigate through the stored results using the arrow keys.
7. Software Update and Printing Reports
7.1 Software Update
The KONNWEI KW650 supports lifetime free software updates to ensure compatibility with new battery types and improved functionalities.
- Download the 'UPLINK' software from the official KONNWEI website onto your PC.
- Connect the KW650 to your PC using the provided Mini USB cable.
- Launch the UPLINK software on your PC.
- Follow the on-screen instructions in the UPLINK software to perform the update. This typically involves pressing any key on the device (except power button) and holding it until the PC recognizes it, then clicking 'Check Update' and 'Updates' buttons.
7.2 Printing Diagnostic Reports
You can print diagnostic reports of your battery tests via a PC connection.
- Ensure the KW650 is connected to your PC with the UPLINK software running.
- From the Main Menu on the KW650, select 'Print' and press 'ENTER'.
- Select the data you wish to print (e.g., Print Data, Print DataStream, Print FreezeData, Print DTC) and follow the prompts in the UPLINK software to print the report.

Figure 7.1: The KW650 connected to a PC for software updates and printing diagnostic reports.
8. Troubleshooting
If you encounter issues with your KONNWEI KW650, consider the following common problems and solutions:
- Device does not power on: Ensure the clamps are securely connected to the correct battery terminals (red to positive, black to negative). The device draws power directly from the battery.
- Inaccurate readings: Double-check that you have selected the correct battery type and standard (e.g., CCA, EN) and entered the accurate rated value for your battery. A dirty battery terminal can also affect readings; clean them if necessary.
- Device freezes or malfunctions: Try disconnecting and reconnecting the device. If the issue persists, perform a software update as described in Section 7.1.
- Cannot connect to PC for update/print: Ensure the Mini USB cable is properly connected to both the device and the PC. Verify that the UPLINK software is installed and running correctly on your computer. Try a different USB port or cable.

Figure 8.1: Visual representation of common vehicle issues that the KW650 helps diagnose, such as motorcycle failure, damage to car equipment, and startup failures.
9. User Tips
- For the most accurate results, ensure the battery is fully charged before performing a battery health test.
- Always clean battery terminals before connecting the tester to ensure good contact.
- Keep the user manual handy for quick reference on battery types and standards.
- Regularly check for software updates to benefit from new features and improved performance.
10. Warranty and Support
KONNWEI products are manufactured to high-quality standards and are backed by a manufacturer's warranty. For specific warranty details, technical support, or service inquiries, please refer to the warranty card included in your package or visit the official KONNWEI website. Keep your purchase receipt as proof of purchase for warranty claims.





