Evaluation of the 200mW red laser module from DX

[pyrokid3]

It came with a diagram for the batteries, and I even tried it both ways after it didnt start. I will just have to send it back.

 

[The_LED_Museum]

Mine had no such diagram; I initially installed the batteries incorrectly, got no beam, and the first thing I did was remove the batteries and reinstall them the other way.