FNIRSI BTM-24 Multifunctional Car Battery Tester

The FNIRSI BTM-24 is an advanced yet easy-to-use multifunctional battery tester for 12V and 24V systems. It replaces several diagnostic tools by measuring voltage, starting current up to 2000A CCA, state of charge (SOC), state of health (SOH), internal resistance, and alternator/charging system performance in a single test.

• Comprehensive diagnostics – checks battery health, cranking, and charging system with one device.
• Non-destructive testing – no battery load during measurement; safe for all battery types.
• One-tap cranking test – records voltage drop during engine start to identify weak batteries.
• Real-time alternator test – monitors charging voltage and waveform to detect alternator issues.
• Wide compatibility – supports CCA, EN, DIN, IEC, JIS, GB standards; works with AGM, GEL, EFB, and lead-acid batteries.
• Clear 2.4" color TFT display – day/night modes for easy reading in any light.
• Safe operation – reverse polarity and overvoltage protection with insulated crocodile clips.

Ideal for mechanics, fleet managers, and car owners, the FNIRSI BTM-24 takes the guesswork out of battery diagnostics, helping you avoid costly repairs and unexpected failures.