According to Streamlights description: "Streamlight’s ProTac is a high lumen tactical light that is USB rechargeable, so it can be charged on-the-go using almost any USB source. It also accepts multiple battery sources to use as a back-up. A multi-function, push-button tail-switch facilitates one-handed operation." It is one of the very first USB rechargeable EDC flashlights which Streamlight has come out with back in 2016. I have been using Streamlight Stingers on duty and they are rechargeable also, but via car charger or wall charger. This Protac USB has a micro-usb cord to charge from any standard USB port. I purchased this Protac USB off of Amazon for around $85 when it first came out in 10/16.
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