Streamlight ProTac 2AA-x and ProTac 2AA-x USB flashlights are machined from 6000 series aircraft grade aluminum with an anodized finish for extreme durability. The ProTac 2AA-x USB includes a lithium polymer battery with integrated USB-C charge port. The ProTac 2AA-x includes two AA alkaline non-rechargeable batteries.Specifications and Features: Battery#: Streamlight 88136 Li-ion rechargeable with integrated USB-C charge port, 1600mAh (1); AA alkaline non-rechargeable batteries (2) Dimensions: 6" long x 0.9" bezel diameter x 0.7" barrel diameter Lamp Type: White LED Light Output: 550 lumens USB Weight w/batteries:: 3.5 ounces Run Time:: 2.25 to 16 hours USB / 2.5 to 48 hiours AA alkaline Charging Time: 4 hours (when using Streamlight 88136 battery) Focus Type: Fixed On/Off: Pushbutton, Tail-Cap Material: Anodized aluminum Origin: Engineered in the USA; Made in China Warranty: Limited lifetime warranty through Streamlight