BTM-24 2000A CCA Multi-Function 12V/24V Car Battery Tester FNIRSI

The FNIRSI BTM-24 car battery tester is a compact tool for fast, accurate battery health checks. It measures voltage, internal resistance, CCA, starting performance, load response and charging system status in seconds. Therefore, it suits car owners, workshops and industrial or telecom sites.

Why Choose the FNIRSI BTM-24?

Guessing whether a battery is still good wastes money and can leave you stranded. The BTM-24 gives a clear pass, warn or fail result after one test, along with a life estimate and practical recommendations. As a result, you know when to charge, service or replace a battery.

Key Features

• Supports 12V and 24V systems: compatible with a wide range of vehicles and equipment.
• Multiple battery types: works with AGM (flat plate and spiral), GEL, EFB and standard flooded lead-acid batteries.
• Six international standards: CCA, IEC, EN, DIN, JIS and GB.
• Full diagnostics: measures voltage, internal resistance, state of charge (SoC), state of health (SoH), CCA rating and load performance.
• Two testing modes: in-vehicle or bench testing, with no need to remove the battery.
• One-tap cranking test: records the voltage drop during engine start.
• Real-time internal resistance test: a non-destructive way to check ageing and health.
• Charging system analysis: shows minimum, maximum and fluctuating voltage under alternator load.
• Waveform display: shows voltage trends and load changes clearly.
• 2.4-inch full-colour TFT screen: with day and night display modes.
• Insulated heavy-duty clamps: for safe, secure connections.
• Built-in protection: reverse polarity alert and overvoltage protection.
• Instant health report: pass, warn or fail status, life estimate and recommendations after each test.

Best Uses

• Car and vehicle battery checks
• Workshops and garages
• Marine, industrial and telecom battery systems

Specifications

• Brand: FNIRSI
• Model: BTM-24
• Type: Multi-function car battery tester
• Rating: 2000A CCA
• Voltage systems: 12V and 24V
• Display: 2.4-inch colour TFT

Please check the specification image below for the full parameter table.

Package List

• BTM-24 host × 1
• User manual × 1
• Data cable × 1
• Storage bag × 1

Frequently Asked Questions

Can I test a battery without removing it?

Yes. The BTM-24 supports in-vehicle testing, so you do not need to disconnect the battery.

Which battery types does it support?

It works with AGM, GEL, EFB and standard flooded lead-acid batteries.

Does it have protection?

Yes. It includes reverse polarity alert and overvoltage protection.

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