The model of BYD f3 key battery is CR1632, and the model of spare key battery is CR2025. The owner can use a flat-mouth screwdriver to rotate clockwise at the bottom of the remote control and pry off the remote control cover to see the battery model. After using the remote control to open the lock, the door can be opened within 30 seconds, if the door is not opened within this time, all the doors will be automatically locked again.
Press the LOCK button, all the lock motors perform a locking action at the same time, and the turn signal light flashes once.
When the car key is turned on in the ignition, the engine control unit ECU sends an encrypted electronically coded signal to the chip in the car key.