OEMTOOLS 24338 100A Battery Load Tester for 6V/12V Batteries — Analog Meter, Steel Case, Up to 1000 CCA

Compact and built for workshop or roadside use, this analog-style tester combines heavy-duty copper-plated clamps, a shock-resistant meter, and a steel housing so you get fast, reliable battery diagnostics without electronic complexity. It’s designed to test automotive, motorcycle, marine, RV, and deep-cycle batteries up to 1,000 CCA, making it a versatile addition to professional toolkits and DIY garages alike.

How fast and accurate are the test results?

Results appear in roughly 10 seconds on the rugged analog meter, giving you a quick assessment of battery condition and cranking capability. The simple load application and clear scale reduce guesswork compared with basic voltage-only checks.

• 10-second load test for rapid diagnostics
• Analog meter reads state of charge and cranking volts
• Designed for up to 1,000 CCA batteries
• Direct under-load reading for battery health insight

What batteries and vehicles does this tester support?

This unit works with both 6V and 12V battery systems and supports a wide range of battery types, including automotive starting batteries and many deep-cycle batteries. It’s suitable for cars, light trucks, motorcycles, ATVs, small marine craft, and RV house batteries within the CCA range.

• Compatible with 6V and 12V battery systems
• Supports batteries up to 1,000 CCA
• Appropriate for automotive, motorcycle, marine, ATV, and RV use
• Useful for both starting and many deep-cycle batteries

How durable and portable is the tool for workshop or field use?

The tester is enclosed in a sturdy steel case with a built-in handle for carrying and storage, and the meter is shock-resistant to withstand typical jobsite bumps. Copper-plated clamps improve conductivity and resist corrosion for consistent contact during repeated tests.

• Steel housing protects internal components
• Shock-resistant meter for tougher environments
• Copper-plated heavy-duty clamps for reliable connections
• Integrated handle for easy transport and storage

What readings and diagnostics can I expect?

Beyond a simple pass/fail, the OEMTOOLS 24338 reports state-of-charge and cranking voltage under load so you can distinguish a weak battery from charging-system problems. Combining load testing with your alternator checks helps pinpoint root causes before replacing parts.

• Measures state-of-charge and cranking volts under load
• Helps differentiate battery weakness from charging issues
• Useful for troubleshooting starting and charging performance
• Clear analog scale for intuitive interpretation

Who is this for: The OEMTOOLS 24338 suits professional mechanics, mobile technicians, and enthusiasts who need a rugged, no-frills battery load tester that performs on-site diagnostics. If you want a durable, portable instrument to evaluate 6V and 12V batteries up to 1,000 CCA, confirm cranking performance, and assist in charging system troubleshooting, this tester delivers practical, repeatable results without relying on delicate electronics.