Please create an option to have the backlight "always on" on the MX Keys while not plugged in, or at least have a backlight timeout function so that it doesn't turn off after just 3 seconds of moving the hand away.

It is very distracting for the eyes when it turns off at such a small time interval, it takes time for the eyes to accommodate to the change in backlight every time. At least 30s to 1min between turning the light off would be great or to have it turn on always (without plugging in) is even better.