KONNWEI KW371 Battery & Relay Tester 6V/12V/24V Analyzer with 2.8" Screen

The KONNWEI KW371 is a professional automotive battery and relay diagnostic tool designed for comprehensive electrical system testing. Supporting 6V, 12V, and 24V battery systems, the KW371 can analyze battery health, perform cranking and charging system tests, and diagnose 4-pin and 5-pin automotive relays. Featuring a large 2.8-inch display, graphical voltage monitoring, relay pass/fail alerts, and compatibility with multiple battery types, this versatile tester is ideal for workshops, mechanics, fleet maintenance, and DIY vehicle diagnostics.

Key Features

Professional 6V, 12V and 24V Battery System Diagnostics

The KONNWEI KW371 is engineered to test a wide range of automotive battery systems including 6V, 12V, and 24V applications. It delivers accurate battery diagnostics for passenger vehicles, motorcycles, trucks, commercial vehicles, marine systems, and off-road equipment, making it suitable for both personal and professional use.

Supports Multiple Battery Types Including Lithium and AGM

Compatible with standard flooded lead-acid batteries, AGM flat plate, AGM spiral, GEL, deep cycle, and lithium batteries. The tester supports a broad testing range from 10-2000 CCA and 5-220Ah, allowing it to analyze both small and high-capacity automotive batteries with precision.

Advanced Battery Health and Performance Analysis

Provides detailed battery condition reports including battery health percentage, voltage condition, charging status, and recommended actions such as recharge, replace, or retest. This helps users quickly identify weak, aging, or failing batteries before they cause vehicle starting issues.

Comprehensive Cranking and Charging System Testing

Performs starter cranking analysis and alternator charging system diagnostics to evaluate overall vehicle electrical system performance. These tests help identify starter motor problems, weak charging systems, alternator faults, and voltage irregularities that may affect reliability.

Integrated 12V and 24V Relay Testing Functionality

The KW371 doubles as a dedicated automotive relay tester capable of diagnosing both 4-pin and 5-pin electro-mechanical relays. It performs quick off-car relay testing, making it ideal for troubleshooting fuel pump relays, starter relays, cooling fan relays, and other automotive electrical components.

Standalone Relay and Component Diagnostic Testing

Features automatic cyclic testing for relay open-and-close operation to determine whether relays are functioning correctly under simulated operating conditions. This allows technicians to identify defective relays quickly without requiring installation back into the vehicle.

Clear LED Indicators and Audible Pass/Fail Alerts

Built-in LED indicators and sound alerts provide instant visual and audible feedback during relay diagnostics, making it easier to identify faulty relays or electrical issues even in busy workshop environments.

Large 2.8-Inch Graphical Display Interface

The bright 2.8-inch display presents battery voltage, health information, testing graphs, and system analysis in an easy-to-read format. Graphical voltage visualization improves user understanding of battery and charging performance during diagnostics.

Data Storage, Voltage Graphing, Printing and Software Updates

Supports advanced functions including data storage, graphical voltage analysis, printable reports, ripple analysis, and software updates. These features make the KW371 useful for long-term maintenance records and professional workshop reporting.

Wide Language Support for Global Compatibility

Features support for 18 on-screen languages including English, German, French, Russian, Spanish, Italian, Portuguese, Japanese, Korean, Polish, Turkish, Dutch, Vietnamese, Indonesian, and more, making it accessible for users in multiple regions worldwide.

What's in the box
1 x KONNWEI KW371 Battery & Relay Tester
1 x Battery Clamp Cable
1 x User Manual