The Serfas TSL-350 is USB rechargeable, totally self contained (no external battery or cord) and has 350 lumens in overdrive mode. The TSL-350 is a great commuter light or light-duty trail light. If you are running a light with more lumens on your bar this would also be a great helmet light.
Max Lumens: 350
Interchangeable Lens for Standard or Wide Beam Patterns
5 hour 30 minutes USB change time
4 hour wall charger time
Weight: 195 grams; 235 grams with bracket
Battery Type: 3300 mAh Li-Ion Battery
Mounts Included: Universal Handlebar Mount; Universal Helmet Mount
Includes (USB) Charging Cable and Wall Adapter
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