Se me the battery box like really good. She's solid and wobbles or does not rattle. As many speakers have already written, the small metal contacts is very small and very close to the plastic. This led me to the the sparked a contact because the plastic was outside rum melted. I then soldered to the springs as a last resort. While going and working properly, but it should not really be the case that you can not even fixed solder a wire without the plastic goodbye.
