Help with first build

[rizzlyfox]

So I recently bought a 3w laser from DTR's shop with a suggested operating current at 2A and maximum of 2.4A. When it arrived to my place I hooked it up to a singular protected 3.7v 18650 with a continuous discharge of 4A. I did not tweak the driver whatsoever prior to hooking it up to the 18650. The laser had a small flash of brighter light but then dimmed down and it looked like a 5mw laser pointer. This is indeed my first build although I have been messing about with different lasers and modifying them, but this is my first time actually putting together a laser.

I also tried using two 18650's and it was still dim. If anyone has suggestions please help me out lmao

 

[Ricker]

Unfortunately it died, it is now "LEDed." For some reason or another it either had too much current, or not enough of a heatsink and burned up due to thermal runaway.