Description

The FNIRSI BTM-24 is a professional-grade car battery tester and charging system analyser supporting both 12V and 24V systems, with a CCA test range of 0 to 2000A. In a single compact device, it measures battery voltage, internal resistance, State of Charge (SoC), State of Health (SoH), CCA rating, cranking performance, and alternator charging output — delivering a complete one-step diagnostic picture in seconds without requiring the battery to be disconnected from the vehicle. The device supports all major lead-acid battery chemistries including standard flooded, AGM flat plate, AGM spiral, GEL, and EFB, and is calibrated against six international battery standards: CCA (US), IEC (international), EN (European), DIN (German), JIS (Japanese), and GB (Chinese). A 2.4-inch full-colour TFT screen with switchable day and night (black/white) display modes ensures readability in both workshop and outdoor conditions. Built-in reverse polarity protection and overvoltage safeguards protect the user and the battery under test.

The BTM-24 provides four distinct test modes: Battery Test (SoH, SoC, internal resistance, CCA), Cranking Test (real-time voltage drop during engine start), Load Test (minimum voltage under alternator load at 2000–2500 RPM), and Charging Test (maximum alternator output voltage with pass/warn/fail status). Each test concludes with a clear health report showing pass, attention, or fail status alongside actionable recommendations — making it equally useful for professional workshops and informed individual vehicle owners. Voltage waveform display visualises load response trends for more intuitive diagnostics. Insulated heavy-duty clamps ensure safe, spark-free connections, and the device includes reference CCA values for engine displacements from 1200cc to above 3000cc to assist in evaluating battery suitability.

For automotive workshops, car battery retailers, fleet maintenance teams, and vehicle owners across Pakistan, the FNIRSI BTM-24 addresses a genuinely common need. Pakistan’s extreme summer temperatures — especially in Karachi where ambient temperatures regularly exceed 40°C — accelerate battery degradation significantly, making periodic battery health checks an essential part of vehicle maintenance. The BTM-24’s ability to test in-vehicle in seconds, without tools or battery removal, makes it a practical and time-saving addition to any workshop or roadside service operation.

Why Choose the FNIRSI BTM-24?

Pakistan’s automotive sector — from individual car owners in Karachi’s DHA and Clifton areas to fleet operators running commercial vehicles and delivery vans — faces disproportionately high battery failure rates due to extreme heat and frequent short-distance urban driving that prevents full charge cycles. The BTM-24 allows a workshop technician or battery retailer to test a battery’s true CCA capacity, internal resistance, and SoH in under a minute without removing it from the vehicle, enabling fast throughput and accurate diagnosis. Its support for 24V systems makes it equally useful for heavy commercial vehicles, buses, and generators commonly found in Pakistan’s industrial and logistics sectors. The reference CCA values by engine displacement provide a practical benchmark for recommending battery replacements to customers, and the charging system test identifies failing alternators before they cause a no-start situation.

FEATURES

• Supports both 12V and 24V battery systems, covering passenger cars, commercial vehicles, SUVs, and heavy equipment.
• Compatible with all major lead-acid battery chemistries: standard flooded, AGM (flat plate and spiral), GEL, and EFB.
• CCA test range of 0 to 2000A calibrated against six international standards: CCA, IEC, EN, DIN, JIS, and GB.
• Measures voltage, internal resistance, State of Charge (SoC), and State of Health (SoH) in a single battery test, delivering a clear pass/attention/fail health report with actionable recommendations.
• In-vehicle testing mode requires no battery disconnection; bench testing mode also available for batteries removed from the vehicle.
• One-tap cranking test captures real-time voltage drop during engine start, diagnosing starter system condition instantly (Good ≥10.2V, Weak 9.6–10.2V, Low <9.6V).
• Load test mode monitors minimum voltage under real alternator load at 2000–2500 RPM, identifying charging system faults.
• Charging test mode measures maximum alternator output voltage and grades alternator condition from Excellent to Check Required, with overvoltage flagging above 15.0V (12V system).
• Voltage waveform display visualises load response trends and voltage fluctuations for intuitive diagnostics beyond simple numerical readings.
• 2.4-inch full-colour TFT screen with switchable day and night (black/white) display modes for clear visibility in all lighting conditions.
• Insulated heavy-duty clamps provide safe, spark-free connection to battery terminals.
• Built-in reverse polarity alert and overvoltage protection safeguard the instrument and the battery under test.
• Reference CCA guide by engine displacement (1200–1600cc: 350CCA; 1600–2000cc: 500CCA; 2000–3000cc: 650CCA; above 3000cc: 750CCA) assists in battery replacement recommendations.

SPECIFICATIONS

• Model: BTM-24
• Supported voltages: 12V / 24V
• CCA test range: 0 to 2000 CCA (selectable standard)
• Supported battery types: Flooded, AGM flat plate, AGM spiral, GEL, EFB
• Supported standards: CCA / IEC / EN / DIN / JIS / GB
• Test modes: Battery Test, Cranking Test, Load Test, Charging Test
• Display: 2.4-inch full-colour TFT; day and night (black/white) switchable modes
• Languages: Chinese, English
• Safety: Reverse polarity protection, overvoltage protection
• Dimensions: 80.52 × 155.76 × 28.15mm
• Weight: Approximately 479g
• Operating temperature: -5°C to 40°C
• Storage humidity: Up to 80% relative humidity
• Warranty: 2 years (direct purchase via fnirsi.com); 30-day return and refund guarantee
• Includes: BTM-24 host unit, data cable, storage bag, user manual

Battery Health Thresholds (12V system):

• SoH 80–100%: Good
• SoH 60–80%: Attention
• SoH 0–60%: Bad (replace)

Cranking Test Thresholds:

• ≥10.2V: Good
• 9.6–10.2V: Weak
• <9.6V: Low (check wiring / starter)

Charging Test Thresholds:

• 15.0V: Overvoltage — check voltage regulator

• 13.9–15.0V: Alternator Excellent
• 13.7–13.9V: Alternator Good
• 13.5–13.7V: Alternator Normal
• 13.3–13.5V: Check Alternator Condition
• <13.3V: Undervoltage — check battery and alternator wiring