The Superflash 65 brings a whole new level of versatility to battery powered tail lights. With four modes this tail light provides 65 lumens and 220 degrees of visibility. FL1 Tested - Run times: 40 hrs (high - 30 lm), 90 hrs (low - 7 lm), 45 hrs (Courtesy - 20-60 lm) and up to 130 hrs (Superflash - 65 lm) Highly visible, even in daylight Run times: 7 hrs (high - 30 lm), 12 hrs (low - 7 lm), 5.5 hrs (Courtesy - 13-40 lm) and up to 11.5 hrs (Superflash - 65 lm) 550 mAh lithium polymer battery charges in 2.5 hours with micro USB cable (included) Battery: 1, 35x20x5mm Lithium polymer , 0.7(V), 2.4(Wh), 32g, Included