This dual display battery diagnostic instrument provides realtime voltage and current readings to help you assess battery health and monitor during replacement. It is designed to streamline the replacement process and protect vehicle electronics. Key benefits and features Dual digital display for voltage and current: Quickly assess battery condition and electrical load with clear, simultaneous readings. Easy to use with the OBD port: Connect to the vehicle's onboard diagnostics port before replacing the battery to ensure a smooth, uninterrupted workflow. Red and blue LED indicators: Dual LED indicators verify correct connections between the storage battery and the vehicle's onboard diagnostics system for reliable operation. Vehicle ECU data memory during replacement: Maintains ECU data during battery replacement to prevent data loss and reduce time spent resetting electronic equipment. Use scenarios vehicle battery replacement: Use the instrument to confirm battery health and ensure correct connections before replacing the battery in a car at home or in a . Professional service setting: Employ the device to verify proper wiring and protect vehicle electronics during maintenance or battery swaps in a service bay. Fleet maintenance: Use across multiple vehicles to safeguard ECU data and streamline battery replacements, minimizing downtime and data reset tasks.