As you can see in the photos I ve attached, first time I turn it on the dot is ok (round and much brighter), if I turn it off and on again it is less bright and it has a strange shape.
This happened first time after I replace its battery with the liitokala battery witch is much havier and it has 3.6 nominal and 4.2 operating voltage (hope I got this right). I will post a photo with it when I get home.
The thing is ..I m using it for pointing at the stars at night, and when it has that unregular shape it also becomes less bright and most important, the beam becomes invisible

So I don t really care about its shape but its beam visibility