Solar timepieces aren’t only for your wrist. Seiko will soon sell a solar wall clock called the Emblem, but only in Japan (for around $300). The Emblem is 8.5 mm thick, and also comes with a battery for the rare days that it doesn’t get enough sun. Seiko claims that the clock needs eight hours of sun per day to keep running. The Emblem also synchronizes with radio transmissions to keep on time.
The lemon powered clock is cool. Reminds me of the lemon powered thinking cap in the hitch-hikers guide to the galaxy.
I remember making something similar in highshool, but it was with coke instead, and it powered our home brew calculator.
That was a good book.
After killing lots of Timex and Casio watches I will stick with suunto watches. At $400 its pricey but its lasted 6 years and counting so its worth it