iPhone 13 pro Max safe to charge battery

Hi

what is the safe and good practice to keep the iPhone battery safe healthy and not damage very fast .

1.if I charge the phone once will reach 20% ?, is that correct or if I charge the phone still in green color battery sign .is this practice still safe and healthy will not damage the battery?

2.if I remove the phone from charger , still not fully charge only reach 80% . Is this will damage the battery?

3.if I charge the phone in the night and sleep , will be full charge and will stay connected in charger until morning and will remove , is this practice will damage the battery ?

4.if I charge the phone with wireless power bank , it will damage the battery ?

1. if the change the cable charger of my phone ,is will affect the phone and battery ?

please advice for the best practice to keep the battery of iPhone 13 safe and healthy and not damage fast .