The vitriol over this topic is humorous. We charge our phones and watches daily, nobody is losing their minds over that. However, asking for the mouse to be plugged in one night a month is outlandish and absurd.
The best part is that this minor issue overshadows the real issue: the ergonomics are terrible. I have large hands and simply can not hold onto the thing properly. Narrow and flat is poor design for something you need to get a grip on to slide around.
Are you perhaps color blind? The shades of red and green were pretty clear for me at a glance.