KONNWEI BK400 Bluetooth Battery Monitor – Professional Car Battery Diagnostic Tester with 6-Device Support, 3-60V, Cranking, and Charging Tests

KONNWEI BK400 – Bluetooth Battery Monitor & Diagnostic Tester

The KONNWEI BK400 is a professional wireless battery monitor and car battery tester designed for all 6V, 12V, 24V and 48V battery systems. Connect it via Bluetooth to your smartphone (Android or iOS) and get real-time voltage monitoring, live waveform analysis, and full cranking and charging system tests – all from the free BK400 App.

Key Features – Engineered for Precision

• Real-Time Voltage & Waveform Monitor: Monitor your battery’s voltage in real time with dynamic waveform curves. The app records historical data and displays interactive charts, so you can track battery health trends over days or weeks. Schedule automatic voltage sampling to keep an eye on your battery condition without lifting a hood.
• Cranking & Charging System Test: The cranking test quickly verifies the battery’s starting capability, while the charging test checks the alternator and rectifier efficiency. Together, they provide a complete diagnostic of your vehicle’s electrical system – a true automotive battery tester for both professionals and DIYers.
• Multi-Device Management: Manage multiple BK400 monitors simultaneously. The app supports up to 6 devices at once, with fully isolated data for each battery. Perfect for households with several cars, fleet operators, or marine applications with dual-battery setups.
• Vehicle Finder (Bluetooth Locator): Never lose your parking spot. The built-in vehicle finder uses Bluetooth to mark your car’s last location on a map (effective range ~10m). It’s a handy car locator feature that adds extra convenience.
• One-Tap Professional Diagnostic Report: Generate a comprehensive diagnostic report with one tap – including cranking voltage, charging voltage, and waveform data. Share the report with your mechanic or keep it for your records.

Additional Features & Specifications