FNIRSI Multifunctional car battery tester 12V/24V 2000A BTM-24

The FNIRSI BTM-24 is a multifunction battery tester for 12 V and 24 V vehicle batteries that combines several diagnostic tools in one device. A single test measures voltage, starting current up to 2000 A CCA, state of charge (SOC), state of health (SOH), internal resistance, and the performance of the alternator and charging system. The non-destructive method does not load the battery during testing. After selecting the battery standard, the result appears as a clear GOOD, CHARGE or BAD rating together with the exact measured values.

The One-Tap Cranking Test records the voltage drop during engine start in real time and reports whether it stays within the normal range above 9.6 V. Dynamic charging and generator checks while driving, along with a waveform graph, help narrow down faults in the alternator, voltage regulator or cabling. The tester supports CCA, EN, DIN, IEC, JIS and GB standards as well as AGM, GEL, EFB and lead-acid batteries, and works with cars, motorcycles, boats and commercial vehicles.

A 2.4-inch color TFT display with day and night modes, insulated alligator clips with reverse-polarity and overvoltage protection, and a kit that includes test leads, a user manual, a data cable and a carrying case make it suitable for workshops, DIY users and used-car buyers.