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Handheld black tester with LCD screen and cable clamps, 16 by 9 by 2.5 cm

KONNWEI KW371 6V/12V/24V Battery & Relay Tester

SKU CH-K7BE-79HHF

Tests 6V, 12V and 24V batteries plus 4- and 5-pin relays in one compact tool

  • Team affiliation1 Piece
  • Key featuresKW371 battery tester, User Manual, USB Cable, Corded Electri
  • Overall height9 L x 2.5 W x 16 H centimeters
  • Overall width9 L x 2.5 W x 16 H centimeters
  • Overall length9 L x 2.5 W x 16 H centimeters
  • Product weight0.27 kg
  • Tests 6V, 12V and 24V batteries across multiple chemistries
  • Diagnoses 4-pin and 5-pin relays without removing the fuse box
  • Runs battery health, cranking and charging tests in one tool
  • Shows clear pass/fail results with graphical waveform display
  • Compact 9 x 2.5 x 16 cm unit weighing 0.27 kg

2-in-1 Battery and Relay Tester

The KONNWEI KW371 combines battery analysis with 4-pin and 5-pin relay diagnostics in a single handheld unit. It suits mechanics and advanced DIYers who need to verify coil function and contact wear without removing the entire fuse box. The tool covers 6V, 12V and 24V systems across motorcycles, cars, SUVs, trucks and boats. Buyers who only need a basic voltage readout will find the feature set excessive.

Testing Limits Across Voltage Ranges

The tester analyses lead-acid, AGM flat and spiral, gel, EFB and lithium chemistries within a 10 to 2000 CCA and 5 to 220 Ah window. It references CCA, JIS, EN, DIN, SAE, IEC and GB standards for result interpretation. Cranking and charging tests capture minimum and maximum starting voltage plus ripple detection under load. Vehicles with battery capacities outside the stated Ah or CCA range cannot be assessed accurately.

Capacity Headroom for Common Applications

A 0.27 kg corded device measuring 16 x 9 x 2.5 cm fits easily in a glovebox or tool bag for mobile use. The 18-language menu and graphical waveform display guide users through health, cranking and charging routines with clear pass or replace outcomes. Polarity reverse protection prevents damage during incorrect connection. Workshops requiring integrated OBD2 scanning or Bluetooth logging must add a separate scanner such as the KW906.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $91.99
Pricier than about 90% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameKONNWEI
Size & build
Overall height9 L x 2.5 W x 16 H centimeters
Overall width9 L x 2.5 W x 16 H centimeters
Overall length9 L x 2.5 W x 16 H centimeters
Product weight0.27 kg
More details
Team affiliation1 Piece

Questions about this item

Should I choose the 6V, 12V, or 24V setting for my vehicle?

Select 6V for motorcycles, 12V for cars and SUVs, or 24V for trucks and boats; the KW371 covers all three ranges in one unit.

What does the 10-2000 CCA range tell me about a battery once the tester is connected?

It means the KW371 can analyse any lead-acid, AGM, gel, EFB or lithium battery rated between 10 and 2000 cold-cranking amps and report state of health, state of charge and internal resistance.

How does the relay-test function work with 4-pin and 5-pin automotive relays?

The built-in relay tester energises the coil and checks contact operation on both 4-pin and 5-pin types, identifying coil failure or contact wear without removing the fuse box.

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