Amazon.com: 16650 Rechargeable Battery, JESSPOW 16650 Rechargeable Li-ion Batteries 1800mAh 3.7V with Button Top for Flashlight and Other Devices [Replacement for CR123A Batteries] (2 Pack) : Health & Household
8-Pack 3.7V 2800mAh CR123A 16340 Rechargeable Batteries for Camera Flashlight - Walmart.com
CR123A and rechargeable substitutes
Amazon.com: 16650 Rechargeable Battery, JESSPOW 16650 Rechargeable Li-ion Batteries 1800mAh 3.7V with Button Top for Flashlight and Other Devices [Replacement for CR123A Batteries] (2 Pack) : Health & Household
Let's Talk Batteries! Probably the Most Confusing Topic--But Most Important! - Fenix Store
2 CR123A vs 18650 Batteries NO NO My Bad - YouTube