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KW371 6V/12V/24V Battery Tester & 4/5Pin Relay Tester 2 in 1

2-in-1 Professional Diagnostic ToolBattery & Relay Testing - Not just a battery tester. The KONNWEI KW371 integrates an advanced 12V/24V relay tester capable of diagnosing 4-pin and 5-pin automotive relays. Quickly identifies coil failures and contact wear without disassembling the entire fuse boxa must-have for mechanics and advanced DIYers.
Wide Compatibility for 6V/12V/24V Batteries - Unlike testers limited to 12V, the KW371 covers 6V (Motorcycle), 12V (Car/SUV), and 24V (Truck/Boat) systems. It accurately analyzes Lead-Acid, AGM Flat/Spiral, Gel, EFB, and Lithium batteries with a 10-2000 CCA and 5-220 Ah range. Supports multiple global standards including CCA, JIS, EN, DIN, SAE, IEC, and GB.
Cranking & Charging System AnalyzerKnow Your Vehicles Full Health - Perform 3 in-depth tests: Battery Health (SOH, SOC, Internal Resistance, Voltage), Cranking Test (Min/Max starting voltage & milliseconds), and Charging Test (Loaded/Unloaded ripple detection). Instantly determines if the issue is a dead battery, faulty alternator, or failing starter.
User-Friendly with Clear Visual Alerts - Features a graphical waveform display for real-time voltage monitoring. Delivers straightforward results: Good Battery, Replace, Bad Cell, or Charge Retest. Polarity reverse protection ensures safety for beginners. Includes 18 language options (English, Spanish, French, etc.) for global usability.

Overview

Specs

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Details
Brand	KONNWEI
Features	KW371 battery tester, User Manual, USB Cable, Corded Electric, false
Height	9 L x 2.5 W x 16 H centimeters
Width	9 L x 2.5 W x 16 H centimeters
Length	9 L x 2.5 W x 16 H centimeters
Weight	0.27 kilograms
Sports Team	1 Piece

Additional Information
First Listed on Newegg	August 07, 2026

Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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