SMART SENSOR 12V24V Car Battery Performance Tester 1. Universal for both 12V and 24V batteries 2. Widely used in battery production measurement, automotive parts repair, and other equipment using lead-acid batteries. It is a tool for analyzing and testing the performance status of lead-acid batteries (not applicable to the measurement of any lithium batteries). 3. The instrument has enhanced input protection, with protection measures to prevent reverse polarity connection, excessive voltage input, and poor contact of the test clamps, ensuring greater safety during use. 4. No need to disassemble the battery; easily completes multiple tests. 5. Battery starting ability: to measure battery life, first turn off the car engine, turn the key to the OFF position, and turn off other electrical devices in the car. 6. Starting system load: to measure battery discharge performance, select the "Starting system load" mode on the instrument, press the OK button, then start the car. The test is complete when ignition is finished. 7. Operating load test: to measure generator performance, first start the car, select the "Operating Load Test" mode on the instrument, press the OK button to increase the engine speed to 2000-2500 RPM, then press the OK button again to obtain the measurement results. 8. Generator charging system test: first start the car, select the "Charging System Test" mode on the instrument, press the OK button, increase the engine speed to 2500-3000 RPM, then press the OK button again to obtain the measurement results. 9. Dimensions: 66x31x173mm 10. Weight: 260g