KW371 6V/12V/24V Battery Tester & 4/5Pin Relay Tester 2 in 1 battery tester automotive with cranking & charging load test, 4/5-pin relay tester, CCA 10-2000, No batteries required.

Professional-Grade Diagnostics at Your Fingertips

Are you a mechanic, fleet manager, or RV/boat owner in need of a reliable diagnostic tool? The Konnwei KW371 2-in-1 Battery & Relay Tester is your all-in-one solution for automotive electrical system health. It combines precise battery testing with relay diagnosis, eliminating the need for multiple devices.

Relay Testing Made Simple

Diagnose 4-pin and 5-pin relays effortlessly. The built-in relay tester quickly identifies coil failures and contact wear without dismantling the fuse box. Save hours of troubleshooting and get back on the road faster.

Universal Battery Compatibility

Unlike testers limited to 12V, the KW371 covers 6V (motorcycles), 12V (cars, SUVs), and 24V (trucks, boats). It accurately analyzes various battery types—lead-acid, AGM (flat/spiral), gel, EFB, and lithium—with a capacity range of 10-2000 CCA and 5-220 Ah. Support for global standards (CCA, JIS, EN, DIN, SAE, IEC, GB) ensures it works with vehicles from around the world.

Deep System Analysis

Perform three comprehensive tests to get a complete picture of your vehicle's electrical health:

• Battery Health: Measures SOH, SOC, internal resistance, and voltage.
• Starting System: Checks cranking voltage and time to detect starter issues.
• Charging System: Detects ripples and load issues to verify alternator performance.

Immediately determine whether the problem lies in the battery, alternator, or starter—no guesswork involved.

Designed for Every User

With a graphical waveform display and real-time voltage monitoring, results are clear and easy to interpret: Battery Good, Replace, Bad, or Charge & Retest. Polarity reverse protection makes it safe for beginners, while 18 language options make it user-friendly for a global audience.

Built to Last, Ready for Work

The KW371 is powered directly by the vehicle battery via durable alligator clips, so there's no internal battery to recharge. USB connectivity allows for firmware updates and report printing on Windows PCs. Whether you're a professional mechanic or a vehicle owner who values reliable diagnostics, the Konnwei KW371 is the ultimate tool you need.

Returns, Refunds and Replacements

Products that are received faulty, damaged, or not as described are eligible for a return, refund, or replacement in accordance with the Australian Consumer Law (ACL). We are committed to ensuring all products meet the standards of quality and reliability expected by our customers. However, please note that we do not accept returns or provide refunds for change of mind. We encourage you to carefully consider your purchase to ensure it meets your needs and expectations.

Delivery Timeframe

Please note that we cannot guarantee the exact date of arrival, and the delivery timeframes (excluding weekends and public holidays) are as follows:

• For customers in Victoria, approximately 7-10 working days;
• For customers in NSW, SA, ACT, and QLD, approximately 9-12 working days;
• For customers in WA, NT, and TAS, approximately 9-12 working days.