less than 130USD = 1500mw (not a typo, 1.5w) green laser

Thanks.
I extracted the module from the pen and mounted it in a heatsink.
Power source: external power supply via analogue driver.

Wez said:

Thanks.
I extracted the module from the pen and mounted it in a heatsink.
Power source: external power supply via analogue driver.

Click to expand...

Well, assuming it was actually made for 150+mW output powers,

I am assuming that the pump diode inside is perhaps capable opf some 1W output, which would require some 1.2Amps.

Running it at 1.5Amps is a serious overdrive and WILL degrade the diode real fast.

Like I said, it's not made for such powers - people designing that pen never thought to install a diode more powerful than what can be reliable powered by common AAA batteries.

I suggest throttling the current back to ~1A just to be safe. Would be a shame to lose such a nice module!