I was just doing random stuff on my phone and went to click a button near the top right of the screen, and was mildly horrified to see "1%", so I immediately put it into the charger, where the phone promptly started showing "0%" for the next ~30 seconds. The phone never died.
Has this happened to any of you?
1 up-down cycle doesn't wear the battery, negligible. It would only count if you would do this every day. It's recommended to calibrate a new battery