I am doing research on best practices for my lithium batteries and lifepo4 powerstation. There’s some conflicting opinions and variation for cycle numbers.
Will leaving my things plugged in at 100% hurt it more than constantly unplugging at 80% and replugging at 20%?
Another anecdote:
My girlfriend and I bought our phones (different makes and models, sadly) at the same time, about a year ago. I have been doing 80/20 religiously while she dgaf and does what she likes. I have not noticed any change in how much charge mine holds while she has started to complain that hers needs charging more often. Her phone cost twice as much as mine.
Similar situation here, except I do 90/30 and my charge speed is limited to 1.8W (I usually boost it to ~10W when I’m in a hurry)
My phone battery still holds its capacity like new, whilst my partner is practically tethered to a charger all the time, with a device newer than mine