I agree, I would want to look it over too.
But I explained to the tech that one of the factory installed batteries failed and leaked into the switch. This was a new light still in the package, never opened. The batteries were dated 11 2015 so it looks like it's about five years old. I told him that I threw away the batteries but could dig them out of the trash can if they want them but he said I didn't need to but could do so if I want. I left them in the trash.