Bright, water-resistant lights are a necessity for riding a bike at night or in bad weather. It’s really nice being seen by other traffic, pedestrians, and cyclists. The only negative part are the batteries. My lights always seem to get dim whenever I don’t have a spare set of batteries. Serfas has just released a new series of lights with a rechargeable power source. Instead of using a proprietary AC-adaptor/charger, however; they utilize a super-convenient USB plug that allows you to recharge using your computer. The USB-1 models have a plug built-in to the light – no cord necessary! They’re also very quick to install and remove, allowing them to be switched between bikes easily and prevent theft. The best part, though, they’re all under $30.