The Autel MAXIBAS BTMS OBDII Memory Saver is a must-have tool for any automotive technician or do-it-yourselfer. This polarity-protected cable connects to your vehicle's 12-volt backup battery, providing power to the onboard electronics via the OBDII/EOBD port. It prevents vehicle data loss and saves you the time and effort of re-coding systems, ensuring smooth operation of your vehicle. The Autel OBDII Memory Saver preserves vehicle codes and electronic presets when replacing the battery, preventing vehicle data loss and saving the time and effort of re-coding systems. Connecting to the vehicle via OBDII and to a 12-volt battery with alligator clips, it's perfect for use in any repair or maintenance situation. Autel MaxiBAS BTMS enables the vehicle's computer to be powered and maintain data when connected to vehicle's backup battery. Autel MAXIBAS BTMS Features surge protection and three LEDs to indicate power supply status. One-Year Limited Warranty. If you have any question about the product, please feel free to contact. The Autel OBDII Memory Saver, is a polarity-protected cable that attaches to a 12 Volt backup battery to provide power via the OBDII/EOBD port to onboard electronics while the vehicle's battery is disconnected, preventing vehicle data loss and saving the time and effort of re-coding systems.Features surge protection and three LEDs to indicate power supply status.