How to change car's key shell

Those with strong hands-on ability can buy a key shell online and replace the car key shell by themselves: after releasing the key blade, insert a smaller screwdriver into the side slot close to the key blade, and carefully push the screwdriver in the direction of the key blade (in the direction of the arrow). The key blade is separated from the chip box. Insert a slotted screwdriver into the groove on the side of the chip housing and rotate to separate the housing buckle there. Then insert the slotted screwdriver into the groove at the top of the chip shell and rotate to separate the shell buckle there. Separate chip boxes, CR2032 battery on the left and chip circuit board on the right. A white rubber pad around the chip board should be waterproof.
If you really can't replace key shell, don't replace it yourself, or find a professional car key company to do it, so as not to accidentally damage the chip.