1Late-model vehicles. Rely on computers that operate everything from the stereo to the transmission. If power is lost to the computer, the settings are lost and have to reset to default. That means the vehicle may feel different when driven, and you may have to enter a security code to access the stereo. 2As our device with 3 meter cable, it will be a convenient way, should you not have jump starter (or Lead-acid battery) on hand, and the device can also get the 12v power supply from cigarette lighter of another good car. Just insert the Cigarette lighter plug to this car and insert into 16 pin plug to the Obd port of the car you want to replace battery. And now you can replace the battery. 3Using this simple memory saving device when replacing your car battery will help you avoid these problems. This device can work with any 12V Dc power source, including jump starter, Dc 12V Lead-acid battery, or another car's Dc 12V power outlet. 48amp fuse built into the memory saver, better reliable on overload protection. Powered by any jump starter with a 12V outlet into an Obd Ii Memory Saver. Interface connector between a 12V Dc power source and vehicle's Obd Ii port. Preserves vehicle codes and electronic presets. 5Compared by most of Obd metal pins in market with zinc plating, ours are gold plating. Better reliable on contact and electric transmission. Compared by most of Obd Ii Memory Saver (or Automotive Computer Memory Saver) in market with 3-5 ft in cable length, ours with super long 10 ft (3 meter) cable. Also by get the alternative 12V power source from another car, when you not have a jump starter on hand.