Description
KINGBOLEN • Battery tester BM550PLUS
The KINGBOLEN BM550 PLUS is a professional battery tester suitable for both in-vehicle and off-vehicle use. It supports testing of 6V, 12V, and 24V lead-acid battery systems, including Flooded, GEL, EFB, AGM Spiral, and AGM Flat Plate types. With a 100-2000 CCA testing range and a crisp 1.8-inch HD color display, this tool delivers rapid diagnostics for SOH (State of Health), SOC (State of Charge), voltage, and internal resistance. Designed for auto repair shops, car dealers, and DIY enthusiasts, it includes reverse polarity protection and plug-and-play simplicity.
Key benefits
- Wide battery voltage support: 6V, 12V, and 24V systems
- Broad CCA range: 100-2000 CCA plus coverage for 2Ah-220Ah capacities
- Fast results: measures SOH, SOC, internal resistance, and voltage in seconds
- Durable safety: reverse polarity protection prevents damage from incorrect connections
- Real-time waveform display: view current, minimum, and maximum voltage on screen
Supported functions
Depending on vehicle compatibility the following functions are supported:
- State of Health (SOH) analysis
- State of Charge (SOC) readout
- Cold cranking ampere test
- Voltage measurement
- Internal resistance evaluation
- Real-time voltage waveform monitoring
- In-vehicle and out-of-vehicle battery testing
Included items
- 1 × KINGBOLEN BM550 PLUS battery tester (Model No. KBL551)
- 1 × user manual










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