Jul 28, 2014 #1 C cyberusman New member Jul 28, 2014 #1 Joined Jul 19, 2014 Messages 9 Likes 0 Points 0 Hi I have a 100mw 650-658nm laser diode/with driver. And I hooked it up to a 3v battery pack and it worked. I wanted more power so o attached a 9v battery and nothing happened. I tried the old battery pack and it doesn't work. Is my laser dead.