What is the best AAA battery for a 100mw laser?

Question

What is the best AAA battery for a 100mw laser?

Answer 1

Lithium batteries will give you the strongest  output power for your laser and it will look brighter.

But if you want something that will last you a long time i recommend AAA NI-MH Rechargeable batteries, these can last you up to days, weeks, and maybe up to a month depending on how much use you put to the laser.