The Tungsten USB adds a micro USB charge port, internal charge circuit and Lithium-Ion power cell to the distinctive Tungsten design. Premium Tungsten features remain. A ringed, three flute grip is machined into a matte black Type III hardcoat anodized aerospace aluminum body. The four cut switch rotates to an Intermittent - Locked - Constant position. The detachable Snap-Loc Clip may be positioned lens up or lens down. All connectors and springs on the Tungsten USB are gold plated. The electronic circuit board drives a Cree XPG2 LED to 425 lumens as measured against the ANSI FL1 Standard.
Loosening the head of the Tungsten reveals the micro USB charge port. Attach the included retractable cord to the supplied Car Charger, Wall Charger or to a computer USB port. Even a micro USB cell phone charger can be used to recharge the Tungsten USB. The charging accessories and Link battery storage case are enclosed in a zippered ballistic carrier.
Dual Fuel Technology of the Tungsten USB allows use of CR123A primary cells. The batteries are unaffected by the Tungsten USB charge circuit.