Logitech K750 Solar Wireless Keyboard - 920-002912 - -
Logitech K750 Wireless Solar Keyboard for Windows, 2.4GHz Wireless with USB Unifying Receiver, Ultra-Thin, Compatible with PC, Laptop - Black - Newegg.com
Logitech K750 Wireless Solar Powered Keyboard
LeFix 3V ML2032 Rechargable Coin Cell Lithium Battery for Logitech K750 Solar Keyboard,Sega Dreamcast|Plastic Scribe and Anti-Static Finger Glove Kit (2Pack)
Logitech K750 'repair' | Fiddlings
Replacing Battery in the Logitech Wireless Solar Keyboard K750 (How To) - YouTube