Solar-powered K980 draws power from any light; lasts up to 4 months in dark and has a 10-year battery life. Full-size, slim layout with numpad and laptop-like scissor keys; multi-device, multi-OS and ...

In a nutshell: The idea of a solar-powered keyboard might sound good in practice, but concerns over battery life and actually getting enough sunlight to power the device put a lot of people off. But ...