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    Quick question about batteries

    I recently bought a HL 532nm 100mW laser from SKY. It came fine, but without a battery. It says it takes a 16340. So: Are 16340 batteries equivalent to CR123A? And also: What voltage should the battery be? I saw CR123A's that were both 3.0V and 3.7V, but the laser doesn't specify what it...


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