Reading the laser forum that is usually a top search result is almost as bad as looking right into a laser beam. You know the one I mean, that took their style from myspace or something. I found the most promising tip on lasers right here on CPF:
passing it on, check out
Sanwu
Thank you for an excellent recommendation.
I was looking for a green laser pointer that would be visible in daytime. As a naturalist, it is very helpful to be able to point out where to look to allow a group to focus in on animals or plants of interest.
I ordered the Sanwu green laser pointer, driven by an 18650 cell, from their website on April 2, 2017, for $18 plus $3 shipping. It was delivered 10 days later, on April 12, 2017.
This is a spectacular value. The pointer itself is very robust, comprising several black anodized aluminum sections totaling 6 inches. There are O ring seals, so it is hopefully somewhat weather resistant.
It is labeled as a Class 3 device, with a max output power of less that 1000mW at 532 +/- 10 nM wavelength.
There is a keyed on/off lock in the tail cap with a spare key included, plus a short lanyard. There is also a screw on diffuser fitting for the laser end, which splits the beam into a kaleidoscope pattern of hundreds of much weaker beams.
Both these safety features appear fully warranted, this is a very powerful pointer.
It is really an industrial tool by all evidence and should be treated as such.
It was shipped in a bubblepack sleeve folded into a manila envelope. No battery was included, which sidesteps any shipping controversy and minimizes the cost.
One surprise for me was that there was no documentation whatever included with the pointer.
Given the quality of the device and its power, I think Sanwu could and should include some marketing oriented data sheets.