How does charging a phone beyond 80% decrease the battery’s lifespan?

Question

Samsung and Apple both released new phones this year that let you enable a setting where it prevents you from charging your phone’s battery beyond 80% to improve its lifespan. How does this work?

In: 2724

Answer 1

Just a note. Samsung has had this feature for awhile. My 2 year old S-series phone allows me to do this. It’s just Apple that has this as a new feature this year.