How to Replace the Battery in a Sonata 8 Car Key?

[DallasFitz]

Here is the method to replace the battery in a Sonata 8 car key: 1. Flip to the tail of the key, where there is a push button. Push it upwards, and the metal key inside will pop out. At this point, you can pull out the key. 2. There is a gap at the tail of the key. Find a tool that can assist in prying, and with a little force, pry it open to reveal the outer shell of the key. 3. After opening the shell, the battery is located quite deep inside, and you might not be able to remove it easily. In this case, you can use a thin object to reach in from the side gap, pry upwards, and then take out the old battery before replacing it with a new one. 4. After replacing the battery, be sure to check it, ensuring the positive side is facing upwards. 5. Once the battery is confirmed to be installed correctly, insert the shell back into place, cover it, and then reinsert the mechanical key.