I just got a 50 MW red pen laser and it was working well for 2 days, but it randomly just turned really weak, about 2 MW. It is rechargeable and I charged it for 10 hours but it is still the same. If anyone knows about this can I get some help?
Most likely problem is that the spring is loosely soldered, re-solder it to the driver board. If that doesn't resolve the issue, either the laser diode could be defective or the circuitry got fried somehow