Can this product be used on a deep charge golf-cart battery?

It can only be used to detect the car battery, not to charge the battery. Our BM550 battery tester can test all 6v 12v 24v 100-2000 CCA car batteries.

Will this tester accurately measure internal resistance in a 12V deep cycle lawnmower battery?

It measures 6v 12v and 24v system batteries. It does read internal resistance but I’m not sure how accurate that particular measurement is because I have never compared this other battery testers.

How do i know if my car battery test result soh, soc, and cca numbers are good or not?

Not sure about social or soh. Cca is one of two prompted questions. If you are not sure of target cca, you might need to look up you battery model and confirm. Once you input cca, the meter goes through a test cycle and gives you actual cca. It decides good or bad based on the cca you input.

Will it give the remaining ah amp hours for batteries or just cca?

Reported values are CCA's. Remaining AH isn't part of the output. You could, roughly, determine the remaining AH through the SOC (State of Charge). For sake of example, if the battery is a 10AH battery, and the SOC = 80%, then you have, roughly, 8AH "left" in the battery. That's not exactly the best way to derive that but it's a ballpark. The element that isn't taken into account is why the battery SOC is where it's at (e.g. age, degradation, discharge due to parasitic draw, etc.). Depending on the combination of those factors will determine what the actual AH capacity is, at that SOH and SOC.

KINGBOLEN Bm550 6V 12V 24V Car Battery Tester, 100-2000 Cca Voltage Tester 2Ah-220Ah Internal Resistance Tester Accurate Digital Analyzer Automatic Battery for Cars, Truck

Product ID: 680280062

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Details

Brand
KINGBOLEN
Colour
Black
Item dimensions L x W x H
12.4 x 7 x 2.3
Power source
Battery
Style
Digital

⚡2Ah-220Ah battery capacity compatibility

📊100-2000 CCA accurate testing range

🔋6V/12V/24V multi-voltage support

Description

🔧 Never get stranded again — master your battery’s health with KINGBOLEN BM550!

BUILT IN SAFETY SHIELD - Reverse polarity protection and clip error alerts keep both you and your battery safe.
VERSATILE BATTERY TYPES - Supports Flooded, AGM (flat & spiral), GEL, and EFB batteries — all in one device.
USER FRIENDLY HD DISPLAY - 1.8-inch high-definition screen delivers clear, real-time battery diagnostics at a glance.
UNIVERSAL VOLTAGE MASTERY - Seamlessly tests 6V, 12V, and 24V batteries for cars and trucks alike.
PRECISION CCA HEALTH METRICS - Instantly reveals battery health (SOH) and charge status (SOC) with pinpoint accuracy.

The KINGBOLEN BM550 is a compact, professional-grade car battery tester designed for 6V, 12V, and 24V batteries ranging from 2Ah to 220Ah. It accurately measures CCA (100-2000), internal resistance, voltage, and provides real-time SOH and SOC data on a crisp 1.8-inch HD screen. Featuring reverse polarity protection and compatibility with multiple battery types, it’s the essential tool for DIYers, mechanics, and fleet managers aiming to avoid unexpected battery failures.

Reviews

A**E

Every car enthusiast person should use this, very useful to know the health of the battery

10.01.2026

K**.

Superbra kvalitet och värt pengarna

23.02.2026

H**H

Worked as intended. Another electronic tool you definitely need if you’re a person eho enjoy’s DIY on car maintenance. Cable and alligator clips are sturdy. This is a compact size easy to hold and handle unlike others which are expensive and bulky

22.02.2026

F**Z

Super Batterietester kann ihn sehr Empfehlen Bin sehr zufrieden,bedienung sehr einfach Danke

27.08.2025

M**E

Works fine. Very small doesn’t take space very nice.

12.02.2026

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