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· The smallest, 1x USB · Utilizes a CREE XM-L2 U2 LED · output of up to 1000 lumens · Integrated “Precision Digital Optics Technology” provides extreme reflector performance · Boasts a peak beam intensity of 12…

https://en.wikipedia.org/wiki/Rechargeable_battery

Amazon.com: 18650 rechargeable flashlight

rechargeable flashlight 18650 | eBay