When I first opened the package, I had a hard time inserting the battery. The wire spring was crooked.I managed to insert the battery with a nail file clipper.As long as that light works well, we are happy with the microscope.
This is a really great microscope! I was pleasently surprised that this actually is metal on it. I thought for the price that a piece of plastic might show up, but it's been doing the job quite well. Obviously if you have older kids that are doing a lot of biology work then you'll want a sharper, more high end model, but for everyday use of random things that you may be looking at or learning about this is perfect! I would buy it again and recommend to others!