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Promethious Copper Beta-QR battery suggestion

Forums › Forums › Gear – The Stuff We Carry › Flashlights & Other Illumination Devices › Promethious Copper Beta-QR battery suggestion

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  • September 11, 2025 at 6:35 am #9819
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    Keymaster

    Just ordered one of these lights. Curious, what is the best battery in terms of brightness and output?
    Thank you.

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