Serfas S500 USB Headlight
Pushing out over 500 lumens in overdrive mode, the TSL-S500 commands your attention on the road or on the darkest mountain trail. The TSL-S500 features a unique user replaceable battery. With additional batteries available for purchase, you can charge up an extra, slide it into your jersey pocket, and ride all night long! This lightweight, compact light includes a handlebar mount, USB Charger, and Wall Charger adapter. You'll never have to worry about overcharging either, the built in smart charger protects your battery and eliminates any chance of this happening.
Serfas has changed the game on high powered lighting by testing its lights in house with a 20
Mtbr Bike Lights Shootout - over 50 bike lights reviewed, photographed and measured here.