Logitech claims that a single 2-hour charge will retain power for three months in total darkness, or more if you remember to flip the on/off switch when you step away. That's standard battery technology, but the solar panels can also draw perpetual power from artificial light sources-in other words, you don't have to raise the keyboard to the sun for it to work the fluorescent bulbs above you will charge it just fine. The panels power the integrated ML2032 lithium manganese button-cell rechargeable battery that then pushes power to the keyboard. The standout features on the K750 are obviously the dual solar panels that sit on either side of the logo branding on top of the keys.

This type of keyswitch also allows Logitech to reduce the thickness of the keyboard chassis to just one-third of an inch. Mechanical keyboards currently popular in the peripheral market, this input device uses scissor switches underneath that register key presses with a lighter touch, and give the additional benefit of low noise.

With its low-profile keycaps and a glossy black mirrored finish behind them, the K750 solar keyboard looks more like a disconnected laptop keyboard than its desktop counterparts.

Logitech solar powered keyboard driver