Memory Saver Eliminates Re-entering Codes and Settings When Replacing Battery 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.,- Preserves Vehicle Codes and Electronic Presets When Replacing Battery - Enables Vehicle Computer to Be Powered and Maintain Data When Connected to Backup Vehicle Battery - Connects to Vehicle Via OBDII and to 12 Volt Battery with Alligator Clips - Features Surge Protection and LED Status Lights - One-Year Limited Warranty