General description This 12V Car Diagnostics Tester is an essential automotive battery replacement tool designed to support vehicle ECU memory during battery changes. It features dual digital displays for voltage and current, ensuring accurate diagnostics and preventing data loss in your vehicle's electronic systems. Technical specifications Maximum Current: 5A Working Temperature: -10℃ to 50℃ Material: Plastic Measurement Allowed Error: +/- 1-3 cm Installation Connect the tool to the vehicle's on-board diagnostic port. Follow the normal steps to replace the battery while the tool supplies constant power to the vehicle's electronics. Usage Dual LED indicators: Red light indicates a good connection with the storage battery, displaying the current voltage; Blue light indicates connection to the vehicle's diagnostics, showing real-time generated current. Prevents loss of vehicle ECU data during battery replacement, eliminating the need to reset electronic equipment. Quality battery