BM550 Car Battery Tester 100–2000 CCA | 6V 12V 24V Analyzer

The BM550 Car Battery Analyzer is a professional-grade diagnostic tool that gives you instant, accurate readings of your vehicle's battery health — right from the palm of your hand. Whether you're a weekend mechanic or a seasoned technician, this tester takes the guesswork out of battery diagnostics for cars, trucks, motorcycles, ATVs, marine vessels, lawn mowers, and golf carts.

Made in Mainland China.

Key Features

• Comprehensive Battery Analysis: Reads voltage, internal resistance, cold cranking amperage (CCA), AH capacity, battery health status, and state of charge — all displayed on a bright 1.8-inch HD backlit screen.
• Wide Voltage Compatibility: Tests 6V, 12V, and 24V batteries across a working voltage range of 4.9V–32V, covering nearly every vehicle type.
• 100–2000 CCA Range: Accurately measures cold cranking capability and calculates battery aging so you know exactly when a replacement is needed.
• Poor Contact Alert: The monitor instantly detects and alerts you when the test clips are not properly secured to the battery terminals — no more misleading readings.
• Reverse Polarity Protection: Built-in safeguard prevents damage to the unit if the input polarity is accidentally reversed.
• Heavy-Duty Copper Clips: Pure copper clamps with a large opening range and strong grip ensure a stable, precise connection every time.
• Durable Test Leads: Made from high-quality, environmentally friendly PVC industrial material with excellent elasticity and long-lasting toughness.
• One-Hand Non-Slip Design: Ergonomic, non-slip body with physical responsive buttons makes operation effortless. Integrated cable design prevents loss of connectors.
• CE Certified for safety and performance.

Specifications

• Model: BM550
• Body Material: ABS
• Cable Material: PVC Industrial Grade
• Color: Black
• Screen: 1.8-inch HD Backlit Display
• Test Range: 6V / 12V / 24V
• CCA Range: 100–2000 CCA
• Working Voltage: 4.9V–32V
• Operating Temperature: -4°F to 122°F (-20°C to 50°C)
• Working Humidity: Relative Humidity < 80%
• Connection: Positive & Negative Clamp Clips
• Certification: CE
• Battery Required: No (powered directly from the vehicle battery)

Compatible Vehicles

Cars • Trucks • Motorcycles • ATVs • Marine Boats • Lawn Mowers • Golf Carts • RVs and more

What's in the Box

• 1 × BM550 Car Battery Tester

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Learn more: FuelEconomy.gov driving efficiency guidance

Frequently Asked Questions

Q: What battery voltages is the BM550 Car Battery Tester compatible with?

A: The BM550 battery analyzer is compatible with 6V, 12V, and 24V batteries across a working voltage range of 4.9V to 32V. This makes it suitable for a wide variety of vehicles including cars, motorcycles, trucks, boats, ATVs, lawn mowers, and golf carts.

Q: Do I need to remove the battery from my vehicle to use this tester?

A: No — the BM550 is powered directly by the vehicle's battery through its copper clamp clips. Simply connect the positive and negative clips to the corresponding battery terminals while the battery is still in the vehicle and let the tester do the rest.

Q: What data does the BM550 battery analyzer actually measure?

A: The BM550 measures and displays voltage, internal resistance, cold cranking amperage (CCA) between 100–2000 CCA, AH capacity, battery health status, and state of charge. Together, these readings give you a clear picture of your battery's current condition and cranking capability.

Q: Is the BM550 safe to use if I accidentally reverse the clamp connections?

A: Yes — the BM550 features built-in reverse polarity protection. If the positive and negative clips are accidentally swapped, the device protects itself from damage and alerts you, so you can reconnect correctly without any harm to the tester.