Let's Talk Batteries! Probably the Most Confusing Topic--But Most Important! - Fenix
Why I Ditched the CR123 Batteries
CR123 and rechargeable substitutes | BudgetLightForum.com
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16340 Batteries
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12-Pack 3.7V 2800mAh CR123A Battery 16340 Rechargeable Batteries for Torch Laser Camera Flashlight - Walmart.com
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CR123A vs AA: Choosing the Right Battery for Your EDC Flashlight | Everyday Carry