I have laser diode and I'm not sure what the power it with. I contacted the guy I bought it from and he said I could power with 9 volts but when I do I don't get nearly the 150 mW it's rated at. It's an aixiz diode and he said it could have a max input of 180 mah (diode death?). I'm wondering if I put it in the computer heat sink that I have could I put more than 180 mAh in it, and could I put more voltage in it. I have some 18650 batteries laying around but I also have a psu I could mod to use that if it would be better. Well I'm on the subject what on the power supply says -5 Volts? I'm assuming that it works as a ground or negative voltage but how does it affect a positive 5 volts? On a slightly related note, do batteries in parallel charges As one cell?