I bought three in the last two months. The first laser charging port wasn’t securely attached. It was pushed in so I had to drill a hole just for my charger to reach and fit it. But after two weeks it lost brightness. The second one I got lost brightness after two weeks then stopped working entirely. The third I have now lost brightness after two weeks.I use them to chase geese away my apartment complex.I love this laser pointer to death because it is class 2 and much brighter than the other lasers on Amazon and You can see it even in sunshine. The makes it much easier to scare geese away.I do have a very powerful “military” laser but I don’t use it because it can easily blind someone. The light spreads a lot even with a magnifier trying to condense the beam.I like these lasers because are bright, cheap and precise where you can see it during the day. But the first and third didn’t last long and the second one I got had imperfections in the lens so the light scattered.I will use these lasers because they are built sturdier and brighter than most you find on Amazon.But a heavy user like myself might go through a few of these it seems.I use these on average 5-15mins a day at most. Perhaps I have that laser on for too long at one time. But I still give this laser a high rating.