
Car battery testers
Kingbolen BM520
The BM520 combines a 6, 12 and 24 V battery tester with a multimeter, and its clamps work either way round.
- ✓6, 12 and 24 V batteries
- ✓Battery, cranking and charging tests
- ✓Built-in multimeter: voltage and resistance
- ✓Reversible connection, no risk of reversed polarity
- ✓USB updates
- Voltage
- 6 / 12 / 24 V
- Range
- 100–2,000 CCA
- Multimeter
- Built in
- Clamps
- Reversible
Right for you if…
You want a versatile battery tester that also replaces a basic multimeter.
Check before you buy
The battery’s CCA rating must be known and entered.
Specifications
| Voltage | 6, 12 and 24 V |
|---|---|
| Range | 100–2,000 CCA, 2–200 Ah |
| Tests | Battery, cranking, charging, waveform |
| Multimeter | Voltage and resistance |
| Updates | USB |
Frequently asked questions
What happens if I reverse the clamps?+
Nothing: the BM520 works either way round without affecting the reading.
Does it work on 24 V?+
Yes.
How do I update it?+
Via a USB cable from a computer.
Kingbolen BM520
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In the same family

BM550
The BM550 handles 6, 12 and 24 V batteries and shows state of health and state of charge in under two seconds.
- Voltage
- 6 / 12 / 24 V
- Range
- 100–2,000 CCA

BM550 Plus
The BM550 Plus builds on the BM550 with an LED screen and a real-time voltage curve, so you can see a battery that sags when cranking.
- Voltage
- 6 / 12 / 24 V
- Range
- 100–2,000 CCA