OBD2 Vehicle ECU Emergency Power Supply Cable, OBD-II Car Memory Saving Cable, OBD Emergency Power Cable with Overcurrent Protection, Overvoltage Protection, Reverse Polarity ProtectionImproved OBD2 OBD power cable: The OBD emergency power cable is primarily designed for replacing car batteries and protecting the data of the car ECU. The LUTIFIX OBD2 car battery replacement tool features an improved design that allows simultaneous display of voltage and current, as well as protection against over voltage, over current and reverse polarity. Important: car batteries must not be connected in parallel and the ECU must not be connected