Replacing a car battery on older vehicles used to be simple!! You unhook the old battery and install the new one.
Late-model vehicles, however, rely on computers that operate everythin from the stereo to the transmission. If power is disconnect from ecu, the settings will 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. Using this simple memory saving device when replacing your car battery will help you avoid these problems.
Product Description and Operation:
1. Powered by any jump starter with a 12V outlet into an OBD II Memory Saver.
2. Interface connector between a 12V DC power source and vehicle's OBD II port.
3. Preserves vehicle codes and electronic presets.
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.
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.
Warning:
1. When working with the vehicle's battery, review all the battery manufacturer's and vehicle manufacturer's safety instructions, warnings and directives regarding battery disconnection, removal and replacement.
2. The vehicle's electrical system is receiving power from memory saver through the OBD connection. Therefore, the vehicle's battery connectors are electrically live and should be covered with an insulator to prevent the connectors from touching metal or each other and causing a short circuit. After each use, disconnect the memory saver and use a dry cloth to wipe all dirt or oil from the connectors and the cable.
3. During battery replacement, DO NOT turn on (ignition) the car, which its old battery is disconnected and new battery not yet finished replacement. As well, DO NOT turn the key on “ACC ON”. If not, the fuse of the memory saver probably burn out, due to high amp and overload.
4. Security attach the OBD II connector of memory saver into your car OBD II port to get a good contact; if not, during battery replacement. the bad contact between the OBDII connector and your car, may cause missing power supply on your car ECU (Electronic Control Unit, or called auto computer).
Заказанный товар получил. Быстро, качественно, удобно. Спасибо! 
