KONNWEI KW331 12V Car Battery Tester with 2.4 inch TFT Color Display, CCA 100-2000, Supports Flooded AGM GEL EFB, Cranking & Charging System Test

The KONNWEI KW331 stands out from typical handheld battery testers by combining a vivid 2.4-inch TFT colour screen with a comprehensive testing suite that covers not just battery health but also cranking and charging system diagnostics. Unlike basic voltmeters, it evaluates your 12V battery against ten international standards—CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE, and GB—making it suitable for a wide range of vehicles, from daily drivers to commercial fleets.

Highlights

• 2.4" TFT colour display for clear, easy-to-read results
• Tests 12V batteries: Regular Flooded, AGM Flat Plate, AGM Spiral, GEL, and EFB
• CCA measurement range: 100–2000 CCA
• Battery health, cranking, charging system, and ripple tests
• Supports 10 test standards: CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE, GB
• Reverse polarity protection and powered directly by the vehicle battery
• Free lifetime software updates via USB port
• Multilingual interface: English, German, French, Dutch, Russian, Spanish, Italian, Portuguese, Polish, Chinese, Japanese, Korean

In daily use

The KW331 is designed for quick, reliable diagnostics without needing a separate power source. Simply connect the heavy-duty clamps (80 cm cable) to the battery terminals and follow the on-screen prompts. The tester displays State of Health (SOH) and State of Charge (SOC) percentages, internal resistance, and voltage (8V–16V DC). The cranking test verifies starter performance, while the charging system test checks alternator output and ripple to catch potential issues before they leave you stranded.

Full specifications

• Display: 2.4-inch TFT colour screen
• Supported battery voltage: 12V
• Battery types: Regular Flooded, AGM Flat Plate, AGM Spiral, GEL, EFB
• Test standards: CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE, GB
• CCA range: 100–2000 CCA
• Voltage measurement range: 8V–16V DC
• Test functions: Battery Health, Cranking, Charging System, Ripple
• Internal resistance measurement: Yes
• SOH/SOC display: Yes
• Connectivity: USB port for software updates
• Operating temperature: -20°C to 50°C (-4°F to 122°F)
• Storage temperature: -20°C to 70°C (-4°F to 158°F)
• Housing material: ABS plastic
• Reverse polarity protection: Yes
• Power source: Powered by 12V vehicle battery
• Cable length: approx. 80 cm with heavy-duty clamps
• Supported languages: English, German, French, Dutch, Russian, Spanish, Italian, Portuguese, Polish, Chinese, Japanese, Korean
• Software update: Free lifetime updates via USB

Final note

The KONNWEI KW331 is a professional-grade yet user-friendly tool that helps you monitor battery health, verify cranking performance, and ensure your charging system is operating correctly—all from a single compact device.