How to Remove the Key Battery of Besturn X40?

[Verona]

From the tail of the key, push up the marked switch, and the hidden mechanical key will pop out slightly, then you can take out the mechanical key. Use the just removed mechanical key to press against the marked position, apply a little force, and the key shell can be opened. After the key shell is opened, insert an object along the gap on both sides, gently pry it, and the old battery can be removed. Do not expose the key to environments below 0 degrees Celsius (too cold) or above 50 degrees Celsius (too hot), as this will significantly reduce the battery's lifespan.