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    Help me to revive cheap 5mW laser

    Hello, I'm new to green lasers. I bought three 5mW lasers from eBay (about $5 each) and only one of them had the normal brightness of a 5mW laser. The other two had very inconsistent, but most of all, very weak output, like they had (almost) dead batteries. I took apart one of them, and thought...


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