The CygoLite Hotshot Lail Light is very very bright. Recharge this light on your computer's USB port. OSP Programmable technology allows you to change flash speeds with the push of a button, and program flash speed to your own preference.
This model comes only with a USB cable for charging. If you want the option of charging on an A/C outlet, there's the CygoLite Hotshot 2W USB Tail Light-Includes USB & AC Adapter.
CygoLite Expilion 800 USB Rechargeable Headlight
CygoLite 3.8v 2.9Ah Li-Ion Battery for Expilion 800, 700, 680 & 600