It's not original an original switch. It's not the same shape as the original. It can be used normally. See the picture for welding method.
After some GBA consoles are powered off, they may need to wait for 3 seconds for the console to be completely powered off before starting up again.

The version with PCB positioning holes is easier to install.

Use switch with PCB. Because of the increased thickness, some shells may need to be trimmed slightly. See photo.