Adapter for maintaining vehicle power supply when changing the car battery, connection via OBD II connector, 12 V power supply.
The adapter is used to preserve vehicle data before disconnecting the battery (e.g. short trip counter, diagnostic codes and other data from the control unit, clock, radio memory, etc.). This eliminates the need to laboriously set everything up again when the battery is reconnected.
The display also shows the vehicle voltage and the current flowing through the socket.
The adapter connects to the external 12V source (battery) from one side via terminals, and to the vehicle being serviced from the other side via OBD 2 plug.
The car battery can then be disconnected or completely replaced with a new one.
The device contains a fuse. It takes electrical power from another source or a second car parked nearby and maintains power via the OBD2 plug in the control unit of the vehicle in which the battery is being changed. This prevents the power from being completely disconnected and the data from being erased, as when the car battery is completely removed.
NOTE: Some vehicle manufacturers do not allow power to be supplied to on-board systems through the OBDII socket. Consult the vehicle manufacturer's manual before use to determine if the use of a memory saver in the vehicle is permissible.
Application Procedure:
Before replacing the battery: Make sure all vehicle accessories (fan, interior lights, etc.) are turned off. The headlights must be in the OFF position, not the AUTO position. To prevent overloading the fuse of this unit or otherwise damaging the vehicle, do not operate the unit if the vehicle current draw is 5 amps or more when the vehicle is in the OFF state (can be verified with a multimeter). If you cannot measure the vehicle current draw, turn the key to the OFF position and wait 25 minutes. This will ensure that all on-board systems go into sleep mode and the idle current draw is as low as possible.
1. Connect the two step clamps to the auxiliary 12V DC battery, the red indicator light will come on.
2. Then insert the plug into the OBD2 connector, the adapter will beep continuously.
3. And now you can remove the old battery from the car and install the new one.
4. Disconnect the connectors in reverse order.
The red light is on, which means a good connection to the car.
The red light is not lit, which means it is not well connected to the car.
The blue light is on and current is displayed.
The blue light is off and the voltage is displayed.