Fits Maglite and Streamlite models: Maglite 201701, 40070249; Streamlight 20170, 26010, 26060, 26120, SL20, SL20S, SL20X W/AC, SL20X W/DC, SL20XP LED W <br>Battery dimensions are: 7 1/16 inches long (~17.94cm) without including the "button" on top, and 7 1/8 inches (18.1cm) long including it. The battery is 1 1/4 inches (3.175cm) in diameter.