In 2013, the wire reported that you should plug in when the laptop battery gets to 40%, and unplug when it gets to 80%. Quoting from the article:
For example, Battery University states that a battery charged to 100 percent will have only 300-500 discharge cycles, while a battery charged to 70 percent will get 1,200-2,000 discharge cycles.
There was also a question posted on superuser in 2012 about the same thing with regard to Mac notebooks.
Question is: it's 2019. Should I still do this or have things changed? If it's still relevant, what's the best way to do this. It's tiring to constantly keep checking your battery percentage, although I've sorted the lower end out by making windows go into power saving mode once it reaches 40% (=I'll be notified).