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Westward 4Z581 analog battery load tester with dual leads and meter face

Westward

Westward 4Z581 Battery Load Tester 4-16 VDC Analog 100A 1000A CCA

SKU CH-6DBN-MQJ37

An analog battery load tester checks 6 V and 12 V batteries with a 100 A load and reads up to 1 000 A CCA

  • TypeElectronic
  • Tests 6V and 12V batteries with analog display
  • Applies 100A load for accurate health check
  • Reads up to 1000A CCA for start power
  • Operates from 4 to 16 VDC input range
  • California Proposition 65 chemical warning applies

Westward 4Z581 Battery Load Tester

The Westward 4Z581 is a battery load tester designed for checking 12 V and 6 V lead-acid batteries in automotive and light-commercial applications. It applies a 100 A load and reads up to 1,000 A CCA on an analog scale, giving technicians a quick pass-or-fail indication. The unit requires no internal batteries and ships ready to use with two test leads.

4-16 VDC Analog Measurement Limits

The tester operates only within a 4 V to 16 V DC window, so it cannot assess batteries outside that range or evaluate charging-system voltage under load. Its analog display shows a needle deflection rather than a numeric readout, which limits precision compared with digital analysers. The 10 A minimum CCA threshold means very small batteries may not register a valid test.

Rugged Hand-Held Build With Fixed Leads

A metal housing and reinforced strain reliefs protect the movement from shop-floor knocks and cable fatigue. Two fixed leads terminate in heavy-duty clamps that grip top-post and side-post terminals without adapters. Because the tester draws its operating power from the battery under test, there are no internal cells to replace or charge, reducing long-term maintenance.

Highlights

  • Tests 6V and 12V batteries with analog display
  • Applies 100A load for accurate health check
  • Reads up to 1000A CCA for start power
  • Operates from 4 to 16 VDC input range
  • California Proposition 65 chemical warning applies

Specifications

BrandWESTWARD
TypeElectronic

Questions about this item

Should I pick the 12 V or 6 V setting for my battery?

The tester handles both 12 V and 6 V batteries across a 4 V to 16 V DC range, so select the setting that matches the battery you are testing.

What does the 1000 A CCA rating tell me when I hook it up?

It means the unit can apply a 100 A load and read cold-cranking performance from 10 A up to 1000 A on the analog scale.

How does the analog display limit what I can see during a test?

The needle shows the voltage drop under load in real time, giving an immediate visual indication without a digital readout.

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