Even the most efficient LED bike lights eventually require a new set of watch batteries. This week, the bicycle accessory company Bookman released the first USB-rechargeable version of its minimal, single LED bike light to the relief of night cyclists worldwide. The USB model costs an extra €20, but when you consider the shopping time plugging a light into your laptop for a few hours versus tracking down CR2032 batteries in drug stores, they're not a bad deal. 

The lights come in pairs of two in four colors, each one perfect for a new Martone.