#9 Solar Bike Odometer
Number two for pedal-powered bikers: the Solar Powered Bicycle Odometer. It looks a bit like an old solar calculator, given the tiny solar panel powering it, but has even fewer buttons. Keep track of current speed, fastest speed, average speed, distance travelled and calories burned, among others. It is also equipped with a 12- or 24-hour clock and measures only 3x2x0.5 inches—very small and easy on the handlebars.
Image credit: familymwr at Flickr under a Creative Commons license
Russ Wright
These are all great products! The Solar Light Cap would have been a great contender for the list as well! It provides 3-4 hours of light from a full day’s charge of its built in solar panel and has 4 modes including Alert, SOS, Strobe and Dimmer. It is weatherproof and provides over 5000 hours of free light from the sun through 2 ultra bright LED lights. Check it out at http://www.currentwear.com.