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Rectangular steel case with handle, analog meter, heavy copper clamps, 12.3 x 7.1 x 3.6 inches

OEMTOOLS 24338 100A 12V Battery Load Tester

SKU CH-73WP-S5J4M

Tests 6V and 12V batteries up to 1000 CCA with 100A load in 10 seconds, housed in a shock-resistant steel case

  • Team affiliation1 Piece
  • Key features100A Battery Load Tester & Voltage Tester, Oemtools, Battery
  • Overall height12.3 L x 7.1 W x 3.6 H inches
  • Overall width12.3 L x 7.1 W x 3.6 H inches
  • Overall length12.3 L x 7.1 W x 3.6 H inches
  • Product weight1.7 lb (0.77 kg)
  • Accurate results in 10 seconds for quick battery diagnosis
  • Tests 6V and 12V batteries up to 1000 CCA for wide compatibility
  • Copper-plated heavy duty clamps ensure secure connections in all climates
  • Shock-resistant steel case with handle provides portable durability for mobile use
  • Measures state of charge, cranking volts and charging system performance

OEMTOOLS 24338 100A Load Tester

The OEMTOOLS 24338 is a 100-amp battery load tester designed for 12-volt automotive systems. It provides a fast health check on or off the vehicle, giving results in roughly 10 seconds. The tool suits professional technicians and DIY owners who need a straightforward pass-or-fail assessment of starting batteries up to 1,000 CCA. It does not serve buyers who require detailed internal resistance readings or advanced alternator waveform analysis.

Sustained Testing Behaviour

The unit applies a fixed 100-amp resistive load for the short duration needed to measure cranking voltage and state of charge. Because the load is brief, the internal components do not reach thermal limits during normal use. The tester is not built for continuous high-current cycling, so it cannot support extended discharge tests or repeated back-to-back loads without cooling intervals. Users who need long-duration capacity checks should look elsewhere.

Build Quality and Connectors

A sturdy steel case measuring 12.3 by 7.1 by 3.6 inches houses the shock-resistant meter and adds 1.7 pounds of weight. The copper-plated clamps grip battery posts firmly, reducing connection resistance in cold or corroded conditions. The integrated handle makes the kit easy to carry between bays or to roadside jobs. The fixed cable length and clamp geometry may limit access on batteries with recessed or side-mounted terminals.

How it compares

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

Price $54.99
Pricier than about 78% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameOEMTOOLS
Product typeVoltmeter
Size & build
Overall height12.3 L x 7.1 W x 3.6 H inches
Overall width12.3 L x 7.1 W x 3.6 H inches
Overall length12.3 L x 7.1 W x 3.6 H inches
Product weight1.7 lb (0.77 kg)
More details
Team affiliation1 Piece

Questions about this item

Does the 100 A load test generate noticeable heat during repeated use?

The tester applies a 100 A load for only 10 seconds per test, so the clamps and meter stay cool during normal diagnostic cycles.

Must the vehicle battery have a minimum cold-cranking amp rating for the 24338 to work?

The unit tests 6 V and 12 V batteries up to 1 000 CCA, so any battery within that range can be evaluated without extra equipment.

Will the analog meter on the 24338 give reliable readings on a 6 V classic-car battery?

Yes, the tester supports both 6 V and 12 V systems, and the shock-resistant meter displays state of charge and cranking volts for either voltage.

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