How to Replace the Battery in a Volkswagen Lavida Car Key?

[McMatthew]

Replacing the battery involves the following steps: 1. Prepare the necessary tools for battery replacement: a flat-head screwdriver, the car key, and the battery. 2. Locate the round button on the side of the car key. Press the round button with one hand while pulling out the mechanical key with the other hand. 3. Hold the key with one hand and the flat-head screwdriver with the other. Find the gap in the middle of the key's top end and insert the flat-head screwdriver into it. Pry the key up and down until a gap is created. 4. Remove the key circuit board, gently push one side of the battery with your finger, and take out the old battery. Place the new battery with the positive side facing up into the battery slot on the key, and gently push it until it is fully secured. 5. Cover the key circuit board back onto the key, align the two separated halves of the key properly, and press both sides of the key with your hands until the upper and lower parts are completely fitted together. Finally, insert the mechanical key back into the key slot.