[dhimes]

It's not so much the power as the total energy delivered that matters. So, in that sense, it will depend on the batteries (or whatever storage mechanism they use) as much as the lasers themselves.

[anfractuosity]

Yeah definitely, I can't help but think the power source needed would be very heavy too.

[rini17]

Who makes you unable to help yourself? Say, one watt delivered onto the retina can do damage very quickly. One AA battery can easily supply that.

[anfractuosity]

Sorry I wasn't thinking about a system capable of blinding people, those do definitely exist though. Also there are devices such as 'dazzlers' which are intended to cause non-permanent damage.

[dhimes]

Yeah, we were talking about something really fun, like being able to melt a boulder or something. %^)