Navcon Car Battery Tester, 12V Digital Automotive Batteries Tester, Alternator Charging Analyzer, Voltmeter with LCD Display and LED Indication, Voltage Indicator for Car Truck Motorcycle Electrical Tools

⚙️Correctly connect the instrument battery clip to the battery terminal, with the red clip connected to the positive pole "+" and the black clip connected to the negative pole "-". If they are reversed, the LED display screen will not display, the PEVERSC indicator light will light up, and an alarm prompt will be issued.

⚙️After proper connection, the LED display screen will show the real-time voltage of the tested battery, and the LED light will light up to indicate the battery status.

⚙️When testing the generator charging system, please ensure that the tester is correctly connected to the battery terminals, and then start the generator. At this time, the output voltage will be displayed on the LED display screen, and the right LED indicator light will light up to indicate the status of the generator.

💐【Reliable Car Battery Tester】BT172 automotive battery tester is engineered to test 12V batteries across a variety of vehicles, such as cars, motorcycles, trucks, RVs, ATV, SUV, boats, yachts, mowers, and even golf carts. The accuracy of this car battery voltmeter is approximately 0.01V, ensuring dependable results.

💐【Alternator Charging System Analysis】Besides assessing if a vehicle's battery needs replacement or a jump start, BT172 can also evaluate the alternator's output status to prevent battery damage from overcharging or insufficient charging.

💐【Easy to Use】BT172 offers three modes for testing the alternator, 12V battery tester, In the middle mode, the LCD screen shows real-time voltage while LEDs indicate the alternator status. Switching to the 12V mode displays the real-time voltage on the LCD screen, with LEDs indicating the battery status.

💐【Protection Features】BT172 is equipped with reverse connection protection to prevent damage in case of incorrect hook-up. The voltage test range is 4-30V DC, and if the voltage is out of range, the screen will display 'LO' (＜4V) or 'HI' (＞30V), providing protection against over-voltage.