Description
Product Overview
The KINGBOLEN BM310 is a compact 12V battery tester designed for accurate diagnostics of automotive and marine batteries. Measuring just 4.7 x 1.9 x 0.7 inches and weighing 2.08 ounces, it fits easily in a toolbox. Built with pure copper clips and a durable housing, the device delivers high conductivity and reliable readings across flooded, AGM, spiral and GEL battery types. Six LED indicators display charge level, alternator performance and fault conditions, while reverse‑polarity protection prevents damage from incorrect connections.
Usage
This tester is perfect for everyday vehicle owners, fleet managers and professional mechanics who need quick battery health checks. Connect the clips to the battery terminals, start the engine and watch the LEDs: green indicates proper charging above 2000 rpm, amber signals a weak charge, and red warns of a failing battery or alternator. It works equally well on cars, pickups, motorcycles, boats, RVs and forklifts, making it a versatile tool for garages, workshops and on‑site service calls.
Why Choose Us
KINGBOLEN combines precise engineering with user‑friendly design. The BM310 features a 12‑month manufacturer warranty and a 30‑day no‑question‑refund policy, ensuring confidence in every purchase. Its copper‑clad terminals provide superior conductivity, while the built‑in reverse protection safeguards both the tester and the battery. The clear LED display eliminates guesswork, allowing even novices to interpret results accurately.
Key Features
- Six LED indicators deliver instant visual feedback on battery charge and alternator health.
- Compatible with all 12V battery chemistries, including flooded, AGM and GEL.
- Reverse‑polarity protection prevents damage from incorrect connections.
- Compact, lightweight design for easy storage and field use.
- 12‑month warranty and 30‑day hassle‑free return policy.
FAQ
Can the BM310 test both lead‑acid and AGM batteries?
Yes, the BM310 is calibrated to work with flooded lead‑acid, AGM flat‑plate, AGM spiral and GEL batteries, providing accurate readings for each type.
What do the LED colors indicate?
Green means the alternator is charging properly above 2000 rpm, amber indicates a low charge or weak alternator output, and red signals a faulty battery or charging system that needs attention.
Is the tester safe to use on a running engine?
Absolutely. The device is designed for on‑engine testing; simply attach the clips, start the engine and observe the LEDs while the engine reaches the recommended RPM.
How does reverse‑polarity protection work?
If the clips are connected incorrectly, the internal circuit blocks current flow, preventing any damage to the tester or the battery.
What is included in the warranty?
The BM310 comes with a 12‑month manufacturer warranty covering defects in materials and workmanship, plus a 30‑day money‑back guarantee if you are not satisfied.
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