The battery will last for approximately 3 years. When there is about one week’s battery power remaining, the diode flashes for 10 seconds, when ParkOne 2 enters or leaves parking mode. The diode is located in the slit close to the round button on the back of the parking disc.
You can buy a suitable battery at any store which sells button cell batteries.
When you replace the battery, you have about five minutes to replace the battery without losing the electronic settings. Note that the parking disc’s LCD display shuts down to save battery power. If the parking disc does not display the time, don’t leave your vehicle.
If you do not manage to replace the battery within five minutes, enter the time and date again (see above).