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Rectangular carbon-pile load tester with dual 4.5-inch analog gauges, red control knob

WUQ

WUQ 24336 500 Amp 12V Carbon Pile Battery Load Tester

SKU CH-R142-1GG51

12 V carbon-pile tester applies up to 500 A load to check batteries up to 1,000 CCA, alternators and starters with dual 4.5-inch analog meters

  • Product typeCar Charger
  • Tests 12 V batteries up to 1000 CCA with 500 A carbon-pile load
  • Dual 4.5 inch analog meters show volts and amps simultaneously
  • Variable load control knob adjusts current from 0 to 500 amps
  • Heavy-duty copper-plated clamps grip through corrosion for accurate readings
  • Built-in 15-second test timer with buzzer enforces proper cool-down cycle

Carbon Pile Load Tester 24336

The WUQ 24336 is a 12 V carbon pile load tester built for automotive workshops and mobile technicians who need to verify battery health, starter draw and alternator output on vehicles up to 1 000 CCA. It applies a variable load from 0 to 500 amps and uses dual 4.5 inch analog meters to show voltage and current simultaneously.

Manual Load Control With Copper Clamps

The tester connects directly to the battery posts via 3 inch copper-plated clamps that bite through corrosion for reliable contact. A manual adjust knob gives precise control over the applied load, while the analog display requires no external power source, leaving the vehicle’s electrical system undisturbed during diagnosis.

15 Second Test Cycle With Cool Down

Each load test runs for 15 seconds before an audible buzzer signals completion, after which a mandatory one minute cool down protects the carbon pile. The cycle limits the operator to three tests within a five minute window, preventing overheating during repeated checks on the same battery.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $173.99
Pricier than about 90% of the 2,768 comparable items (median $21.99).

Specifications

Product
Product typeCar Charger

Questions about this item

How long can I run the 500 amp load before the tester requires a cool-down?

The tester buzzes after 15 seconds of load engagement and requires a 1-minute cool-down, allowing up to 3 tests within a 5-minute window.

Does the carbon pile generate noticeable heat or noise during repeated 15-second test cycles?

The tester enforces a 1-minute cool-down after each 15-second load cycle to manage heat; a buzzer signals when the 15-second test period ends.

What vehicle electrical system is required for this 12V tester to operate?

The tester is designed for 12V DC batteries, alternators, and starters, supporting tests up to 1,000 CCA with a 0-500A variable load.

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