- Nov 23, 2016
So, a while back I bought this shitty Chinese 5Watt laser(it claims itself as a class IIIb laser) but what I didn't know is that it didn't ship with batteries. It needed an 3.7 volt UltraFire li-ion battery(the ones you find in power banks). So, I bought a random power bank, in my case a 2300MAh cylindrical bank. Charged it, and then ripped out the battery. Shoved the battery in the laser but all I got was a brief green weak light and then a red glow. I have seen that before and now I finally know it's IR(eyes are probably dead, stared at those red glows numerous times in my life) but why is the laser not firing up? I can provide pics and videos.