TOPDON BT100W Bluetooth 12V Battery & Electrical System Tester
Bluetooth Battery, Cranking & Charging Tests
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TOPDON BT100W Bluetooth 12V Battery & System Tester
Bluetooth 12V Battery & Electrical System Tester
The TOPDON BT100W is a professional 12V automotive battery and electrical system tester with Bluetooth connectivity for convenient mobile app integration. Designed for automotive technicians, workshops and vehicle owners, it performs battery, cranking and charging tests to assess battery condition and electrical system performance. Its standalone interface provides quick on-device testing, while the companion app enables comprehensive system testing, detailed battery analysis, test report management and access to a built-in battery reference library.

Main Features
- Professional 12V Battery Testing – Evaluates automotive battery condition by measuring state of health (SOH), state of charge (SOC), cold cranking amps (CCA), and internal resistance to identify potential battery performance issues.
- Bluetooth Mobile App Connectivity – Connects wirelessly to the compatible mobile application for advanced battery diagnostics, comprehensive system testing, detailed analysis, and convenient test report management.
- Standalone Battery Testing – Performs essential battery tests directly through the integrated LCD interface without requiring a smartphone, providing convenient testing for workshops and automotive technicians.
- Comprehensive Cranking System Analysis – Measures engine cranking voltage and cranking time to assess starting performance and identify potential battery or starting system faults.
- Vehicle Charging System Testing – Evaluates automotive charging system performance to help identify irregular charging conditions and potential alternator-related issues.
- One-Touch System Testing – Performs combined battery, cranking, and charging tests through the companion mobile app with a single command, streamlining diagnostic procedures and improving workshop efficiency.
- Integrated Battery Reference Library – Provides access to essential battery information, including testing standards, cold cranking amp ratings, and technical specifications, through the mobile application.
- Detailed Digital Test Reports – Generates comprehensive battery diagnostic reports containing state of health, state of charge, internal resistance, and other key measurements for convenient review and recordkeeping.
- Seamless Data Synchronisation – Synchronises diagnostic information between the BT100W tester and compatible mobile application, ensuring consistent access to battery testing results across both interfaces.
- Clear LCD Display – Features an integrated 128 × 64 LCD screen for convenient viewing of battery test measurements, diagnostic information, and test results directly on the device.
- Bluetooth 5.0 Wireless Communication – Supports Bluetooth 5.0 connectivity with a communication range of up to 10 metres, enabling convenient wireless operation with a compatible mobile device.
- Wide Battery Testing Range – Supports battery testing from 100 to 2000 CCA, providing versatile diagnostic capability across a range of compatible 12V automotive batteries.
- Multilingual Device and App Support – Offers eight selectable languages on the tester and nine languages through the mobile application, supporting technicians and automotive workshops across different regions.
- Compact and Portable Design – Features a lightweight construction with an integrated testing interface and battery clamps, making it suitable for workshop servicing, routine maintenance, and mobile automotive diagnostics.
Package Includes
- 1 x TOPDON BT100W Battery Tester
- 1 x User Manual
- 1 x Quick User Guide
Why Buy the TOPDON BT100W Bluetooth Battery Tester?

| Professional 12V automotive battery testing |
| Bluetooth connectivity for mobile app diagnostics |
| Standalone battery testing with integrated LCD display |
| Battery health (SOH), charge (SOC) and CCA analysis |
| Cranking voltage and starting system testing |
| Vehicle charging system performance analysis |
| One-touch battery, cranking and charging system tests via app |
| Integrated battery reference library and specifications |
| Digital battery test reports and data synchronisation |
| Wide battery testing range from 100 to 2000 CCA |
| Bluetooth 5.0 wireless communication up to 10 metres |
| Multilingual support with 8 device and 9 app languages |
| Compact and portable design for workshop diagnostics |
TOPDON Battery Tester Comparison: BT100 vs BT200 vs BT300P vs BT600 vs BT600 Plus
Every TOPDON car battery tester uses conductance testing to check battery health in seconds, with no heat, sparks or battery drain. All five test Flooded, AGM, Gel, EFB and VRLA batteries from 100 to 2000 CCA, and double as a cranking (starter) and charging (alternator) tester. The differences are 24V truck support, a built-in printer, screen size and professional workshop features.
| Compare features | Most capable |
||||
|---|---|---|---|---|---|
| Best for | Simple 12V battery checks at home | Home garages, plus 24V cranking & charging tests | Workshops needing printed customer reports | Workshops wanting a big screen, printer & system test | Professional, fleet & 24V truck battery testing |
| Battery type | |||||
| Battery voltage tested | 12V | 12V | 12V | 12V | 6V / 12V / 24V |
| Cranking & charging system voltage | 12V | 12V / 24V | 12V / 24V | 12V / 24V | 12V / 24V |
| Battery types supported | Flooded, AGM, Gel, EFB, VRLA | Flooded, AGM, Gel, EFB, VRLA | Flooded, AGM, Gel, EFB, VRLA | Flooded, AGM, Gel, EFB, VRLA | Flooded, AGM, Gel, EFB, VRLA + internal resistance for lithium, alkaline & carbon-zinc |
| Test standards | |||||
| Testing range | 100–2000 CCA 30–220Ah (GB) | 100–2000 CCA 30–220Ah (GB) | 100–2000 CCA 30–220Ah (GB) | 100–2000 CCA 30–220Ah (GB) | 100–2000 CCA 30–220Ah (GB) |
| Battery rating standards | CCA, CA, BCI, MCA, DIN, IEC, EN, SAE, JIS, GB | CCA, CA, BCI, MCA, DIN, IEC, EN, SAE, JIS, GB | CCA, CA, BCI, MCA, DIN, IEC, EN, SAE, JIS, GB | CCA, CA, BCI, MCA, DIN, IEC, EN, SAE, JIS, GB | CCA, CA, BCI, MCA, DIN, IEC, EN, SAE, JIS, GB |
| Test functions | |||||
| Battery test | 12V | 12V | 12V | 12V | 6V / 12V / 24V |
| Cranking (starter) test | 12V | 12V / 24V | 12V / 24V | 12V / 24V | 12V / 24V |
| Charging (alternator) test | 12V | 12V / 24V | 12V / 24V | 12V / 24V | 12V / 24V |
| Full system test | – | – | – | 12V | 12V / 24V |
| Ripple (alternator diode) test | ✓ | ✓ | ✓ | ✓ | ✓ |
| Internal resistance test | – | – | – | – | ✓ |
| Sequence (batch) test | – | – | – | – | ✓ Up to 500 batteries per group |
| Data & software | |||||
| Stored test results | Last 1 | Last 1 | Last 1 | Last 1 | Last 10 |
| Software updates | – | – | – | ✓ | ✓ |
| Smartphone app | – | – | – | – | – |
| Screen & hardware | |||||
| Display | 2" backlit LCD | 2.4" colour | 2.4" colour | 3.5" colour | 3.5" colour |
| Built-in thermal printer | – | – | ✓ | ✓ | ✓ |
| Rechargeable internal battery | – | – | – | – | 5200mAh Tests flat batteries down to 2V |
| Other | |||||
| Languages | English, Spanish, French, German, Italian, Russian | English, Spanish, French, German, Italian, Portuguese, Russian, Japanese | English, Spanish, French, German, Italian, Portuguese, Russian, Japanese | English, Spanish, French, German, Italian, Portuguese, Russian, Japanese | English, Spanish, French, German, Italian, Portuguese, Russian, Japanese |
Battery voltage tested is the battery the tester can assess directly. Cranking & charging system voltage is the vehicle system it can check. Only the BT600 Plus tests 24V batteries directly; the BT200, BT300P and BT600 test 12V batteries and check the cranking and charging systems of 24V vehicles.
Comparison tables are for reference only and based on TOPDON specifications. Refer to each product page or contact us for more information.
TOPDON BT100W Bluetooth Battery Tester – Technical Specifications

| Model: BT100W |
| Testing Range: 100–2000 CCA, 30–220 Ah (GB) |
| Testing Voltage: 12V |
| Battery Standards: CCA/CA/BCI/MCA/DIN/IEC/EN/SAE/JIS/GB |
| Ripple Test: Yes |
| 12V Battery Test: Yes |
| 12V Cranking Test: Yes |
| 12V Charging Test: Yes |
| System Test: 12V |
| Mobile App: Smartphone compatible |
| Display: 128 x 64 LCD display |
| Built-in Printer: No |
| Compatible Battery Types: Flooded, AGM, Gel, EFB and VRLA |
| Battery Library: Yes |
| Data Retrieval: Limited |
| Device Languages: English, Spanish, French, German, Italian, Portuguese, Russian and Japanese |
| App Languages: English, Chinese, Spanish, French, German, Italian, Portuguese, Russian and Japanese |
| Updates: Available (subject to app support) |
Delivery
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Need it sooner? Express shipping is also available—check if your postcode is in the Next Day Delivery network.
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