The most convenient wireless keyboard I had was a Logitech one with solar panel recharging that would run on office lighting (or ambient light through windows).

The most convenient wireless keyboard I had was a Logitech one with solar panel recharging that would run on office lighting (or ambient light through windows). Eventually the rechargeable cell stopped charging and it's user-replaceable but I hadn't replaced it yet. It also has an HID USB adapter which is great that it kicks in before a bluetooth one which is helpful for doing PC BIOS/CMOS setup on boot or easily catching BIOS boot menu options.