Good UV flashlight, unfortunately bad charger

I bought the flashlight to find her invisible markings and writing can, both for my profession and for the private geocaching fun. I must say that my flashlight really like it very much. The cone of light is very good and bright enough. Therefore is nothing wrong with the flashlight. The battery lasts about 2 hours, so that you have enough light. But more on that later!

The torch is used to sell with and without charger. For 1-2 there is the charger from hard plastic with an unknown male and travel adapter with it. The charger feels when using any cheap to, also has the LiPo because no good seat. When pulling out the charger from the socket of the adapter is in the wall socket. The charger charges the LiPo with approximately 1C. However, it will not go into constant voltage mode to actually charge the battery fully. I measured it myself. The charger is in my view therefore not really good and is first replaced by another. Therefore, -1 star.

The flashlight itself came to the charger and the battery in a bag. There was no description or similar case. The flashlight is bright enough in theory, so you could theoretically do without on a normal flashlight. But precisely here lies the danger! The flashlight does not emit light, but (almost exclusively) high-energy UV light. People who are not familiar with it and think they can do without the normal flashlight, can burn eyes very quickly. In my opinion, include warning labels on the flashlight do not shine in your eyes and a maximum recommended service life. Also why -1 star.