Olight S10R II Baton Generation II 500 Lumen Rechargeable LED Flashlight with RCR123A Battery and USB Charger Dock CREE XP-L HD LED, 500 lumen maximum output Super compact at under 3 inches and ultra lightweight at under 2 ounces. Perfect for everyday carry Strong magnet on tail cap lets light be attached to magnetic surfaces for hands-free illumination Low battery indicator function. Red LED on the button will light up when the battery is low. Flat side button to prevent the light turning on accidently in the pocket.