I recently bought a 532nm green laser from ebay, and it came without a battery. I tried it with my ecig's 18650 3.7V Li-ion battery and it seems to work like a charm, although I later found out it's supposed to be used with 2 16340 3.7V batteries (the contacts are a little loose so sometimes I need to shake it a bit to make the battery connect again). Today I received my class 4B (is that even a rating? I thought nothing was beyond 4) 450nm blue laser and tried the same thing (the seller here also recommends 2 16340 batteries): to my dismay, the laser is absurdly dim and quite divergent (although the adjustable focus fixed this a bit). I thought maybe the battery wasn't powerful enough and indeed when I put it back in my green laser it wouldn't turn on. "Maybe the blue laser drained the battery" I thought. So I went on Amazon and looked for '16340 3.7V rechargeable battery' and got blasted with all sorts of products with confusing names like type C or CR2 battery: what the hell does that even mean? Do you guys know exactly what I should look for on Amazon to find 2 pairs of the right batteries for my pointers?
Thanks in advance!
Thanks in advance!