The S1A Baton is an all new LED flashlight powered by a convenient single AA battery. The S1A is the upgraded version of the extremely popular S15 Baton with double the performance including our signature TIR optic lens that delivers 600 lumens. This flashlight is compatible with any AA battery for ease of use (Diameter:14mm; Length: 50mm). The S1A Baton has five brightness levels and a strobe mode covering a range of 0.5~600 lumens. The S1A maintains the signature style of the Olight Baton series such as the black stainless steel pocket clip using salt bath nitride technology, blue clamping ring on the flashlight bezel and button, and a magnetic tailcap. Being so compact, it can be placed in a pocket, bag, or attach to a belt.The S1A Baton is a convenient illumination tool that can meet anyone’s everyday needs.