Battery recharging
I got an iPhone 12 last week and was researching via youtube all the "first 10 settings" to change and saw there are a bunch of videos on how to extend your battery etc... now they say it's best to recharge when it gets to 20% and charge it to 80%. I always thought it was best to charge when you are about 10% and under and charge it to 100%. Is this one of those topics that changes all the time?