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What do you want to burn? Or do? That will determine the power required.

200mW 650nm Burning Red Laser Module w/ Battery Case

You can't have to many mAh. The more the you got the battery lasts longer.

I was practicing uploading pics awhile ago and I noticed sometimes there is and sometimes there isn't an attachment button. Can't remember why. On this post there is an "insert image" icon but it needs to be uploaded somewhere else. I was able to pull them off my computer but not now. I thought...

When lasers are outlawed only outlaws will have lasers.

I also just discovered something that may be well known but was really cool. I just put a new battery in a 445 and wanted to try it out. Had a bunch of papers sitting next to me. (standard 8 x 11 white with black printing.) Picked up a piece and slipped on my glasses. Everything looked fairly...

I looked on ebay a few times and never saw those! They look about the best so far. I think ideal size would be about 10-11mm round to slip inside. I am going to get a couple and try them out.

I guess you could if you knew how and had the proper cutter. Getting a good diamond cutter and screwing up a bunch to figure it out could get expensive. Worth looking into.

Interesting price differential. $20 round on ebay or $3.5 square from o-like. I have several from four or five sellers and they all have the same size screw in lens, diameter, etc. I asumed they were a standard size.

I guess I should have said I got that filter strictly for measurement purpose, not to be used on the module. It allows any ir to pass through. I guess there are two ways to measure. A filter that BLOCKS the ir and one that lets only ir through.

No they don't. They are mostly 200mw and measure 180 - 214. I just got a large "ir720" filter, supposed to block everything below 720. When this is placed in front of the meter the reading drops but still ranges from 30-60 or so. I'm estimating there is a good 20-30% ir on average.

OK I know this has been mentioned a zillion times and I have read and searched and looked at several sites for ir filters. I have a few modules I would like to put filters on. The standard answer is "get an ir filter and glue it to the end of the module". I'm having trouble finding them. (small...

I guess it depends on how picky you want to get. They are brighter than hell, good beam, will light a match a foot away. I'm happy.

Prices will be all over the place for the same things. You can find 250mw green lasers for $35. Only problem is once you get it you will be lucky if its 50mw. Several reliable sellers are mentioned around here if you look.

I have bought several from laserland. They state in their add 10% tolerance. (which was one of the main reasons that I orderd because they actually stated it, many don't) Last two I got measured 201 & 214. Just ordered another...

Also MANY of the sellers grossly exaggerate (I won't say out right bull shit lie just to be nice) so you need to do research on the sellers. A good guide line is if its high power and real cheap you probably are not getting the power rated. The rating and what you paid is a close call. Just a...

Higher power green is desirable so you can see the spot in daylight out doors. Other than that they are a disadvantage if somebody is shooting back. Especially at night because the beam goes right to you.

I have a couple gun sights with the scope/laser. If the are "inexpensive" sights with built in laser they are most likely 5mw.

They would work for losing weight if you ran around chasing the dot.

Yes bigger batteries! The last 1W I got from DTR I unpacked it, was sitting down checking it out, dangling it by the wires, (module pointing down), grabbed a battery (18650) and touched it to the wires just to be sure it was working. In a couple of seconds it burned a hole in my pants. (I've...