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    What is up with polarity??

    New guy figuring out things. I have used 18650 LED flashlights practically since they came out. I picked up a couple cheap laser pointers and seeing some have case positive polarity and some case negative polarity. OK I can understand the different design. Then toss in most of these do not come...
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    Newbie looking into the laser hobby.

    I am from the Midwest USA. Older guy who is into automotive, machining, welding and firearms. I have worked on all kinds of repair projects. Form score boards to water wells. So I do understand safety. I picked up a couple of cheapo lasers to mess with. I have been digging on the forum for...


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