2. Put the keys face up, and put the left index finger and thumb on both sides of the keys respectively. At the same time, insert the coin or card into the middle gap with your right hand and pull it out in the middle of the gap until the key is opened. Move carefully and slowly to avoid touching the inside of the motherboard.
3. Then replace the battery, buy a button cell of the same model, tilt the old battery card and replace it with a new button cell. Pay attention to the positive and negative poles, and be careful not to confuse the old and new batteries.
4. Align the front cover with the rear cover and tighten the key. If it cannot be fastened, check whether the direction is reversed. Be careful not to use too much force or damage the retaining ring.
5. Then insert the key back and replace the battery.
6. After replacing the key battery, it needs to be initialized to restore the remote control function. After the key is inserted into the ignition hole, press and hold the key to lock the car key, and then rotate it to the car initialization position for about 8 seconds. Press the key continuously to return to the initial position, and then release the key for a few seconds.