OBDResource Car Battery Tester BR502 — 6V/12V/24V Digital Analyzer, 100–2000 CCA & SOH/SOC

The OBDResource BR502 is a handheld digital battery tester that quickly evaluates 6V, 12V and 24V batteries (100–2000 CCA) by measuring voltage, internal resistance, SOC and SOH to deliver fast, reliable pass/fail guidance.

Whether you're a DIY vehicle owner, fleet manager, or marine enthusiast, the BR502 provides a compact, easy-to-use way to check battery condition before a no-start event. The unit supports common battery chemistries—flooded lead-acid, AGM flat plate, AGM spiral and gel—so you can test batteries found in cars, trucks, motorcycles, boats and SUVs. It produces results in seconds on a clear 1.8-inch display and includes safety features like reverse-polarity protection for confident operation.

How does the BR502 determine if a battery needs service or replacement?

The BR502 analyzes battery health by combining voltage reading, cold cranking amps (CCA) test and internal resistance to estimate State of Health (SOH) and State of Charge (SOC). The device compares measured values to CCA benchmarks and returns an easy-to-understand status: Good, Normal or Poor.

• Measures 100–2000 CCA to assess starting capacity
• Reports internal resistance to reveal cell deterioration
• Displays SOC and SOH percentages to inform charging or replacement
• Provides immediate replace/charge suggestions on screen

Can I use this tester on different vehicle types and battery chemistries?

Yes—the BR502 is designed for broad compatibility. It supports 6V, 12V and 24V systems and common lead-acid battery types used across passenger cars, light trucks, motorcycles and marine craft. This versatility makes it useful for personal vehicles and small fleets.

• Works with flooded, AGM flat plate, AGM spiral and gel batteries
• Compatible with cars, pickups, SUVs, motorcycles, boats and more
• Tests batteries in-vehicle or after removal, even if heavily discharged
• Suitable for 6V, 12V and 24V electrical systems

How fast and accurate are the test results?

The BR502 delivers results in about two seconds thanks to an onboard intelligent microprocessor, with a stated accuracy rate up to 99.6% against CCA standards. Fast readings let you diagnose multiple batteries quickly during routine maintenance or pre-trip checks.

• Results display on a 1.8-inch HD screen within two seconds
• High-precision CCA-based assessment for reliable diagnostics
• Clear Good / Normal / Poor outcome to simplify decisions
• Rapid testing reduces downtime for fleet or workshop tasks

Is the BR502 easy and safe to use for beginners?

Yes—the tester is plug-and-play: clamp the color-coded clips to the battery terminals and the unit will run its test automatically. Safety features prevent damage from accidental reverse connection and help protect both the tester and the battery during use.

• Simple clamp connection works in or out of the vehicle
• Reverse polarity protection disables the tester if clips are swapped
• Screen flicker warning indicates poor clip contact to improve reliability
• No complex setup required—designed for first-time users

Who this is for: The OBDResource BR502 is suited to car owners who want fast, readable battery checks at home, motorcyclists and boat owners who need portable diagnostics, and small-fleet operators or technicians who require dependable CCA-based testing without bulky bench equipment. If you want clear guidance on charging versus replacement and the ability to test a wide range of 6V–24V batteries quickly and safely, the BR502 offers a compact, accurate solution.