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The BT-172 12V Car Battery Tester is a professional-grade digital tool designed to provide accurate and efficient testing for 12V automotive batteries and charging systems. Whether you’re a DIY enthusiast, a professional mechanic, or need a reliable device for roadside emergencies, this compact and portable yzer offers comprehensive functionality to keep your vehicle’s battery and charging system in optimal condition.

Features:
Multifunctional Battery & Charging System yzer: Specifically engineered for 12V automotive batteries, it accurately measures battery voltage and evaluates the performance of the vehicle’s alternator and charging system. Simply connect the alligator clips to diagnose battery health and charging output quickly.
Clear LED Status Indicators: Equipped with a digital display and color-coded LED lights (green, yellow, red, blue, white) that instantly show battery status—FULL (normal), MEDIUM (slightly low), LOW (needs charging), EMPTY (dead), HIGH (overcharging), GOOD (alternator OK), DEAD (faulty battery), and REVERSE (polarity error), eliminating the need for complex interpretation.
& Protective Features: Built-in reverse connection alert (audible buzzer + LED warning) prevents damage from incorrect hookup. Overvoltage cutoff ensures use when checking the charging system. The rugged rubber housing with insulated alligator clips adds durability and user .
Easy-to-Read Digital Display: The bright LED screen shows real-time voltage readings with precision, providing immediate results whether checking a stationary battery or a running engine for quick diagnostics.
Compact & Portable Design: Lightweight and pocket-sized, this yzer is perfect for various scenarios. The integrated alligator clips provide secure connections without the need to hold probes, enhancing convenience during use.

Specification:
Model：BT-172
Material：ABS Plastic + Rubber
Voltage Type：12V DC
Display：LED Digital Screen
LED Indicators：Red / Yellow / Green / Blue / White (Color-coded for status)
Warning Type：Audible Buzzer for Reverse Polarity & Low/Dead Battery
Operating Temperature：0°C – 40°C (32°F – 104°F)
Item Dimensions：115 × 70 × 20 mm
Item Weight：78 g
Color: Black

Package Contents:
1 x BT-172 Battery Tester
1 x User Manual (Instruction Manual)
1 x Packing Box

Please Notes:
1,The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
2,Please allow slight manual measurement deviation for the data.