At What Percent Should You Charge Your Iphone. And if it helps you stay within the 20 to 80 percent power band thats a very good thing. Battery University stated that the lithium-ion battery in your phone will last longer if you keep it between 65 to 75 charged at all times.

If an update is available connect your iPhone to Wi-Fi attach the charger to your Apple Watch make sure it has at least 50 charge and update wirelessly. Thats why you should keep this in mind while charging your iPhone overnight when you cant monitor its temperature. Theres no absolute rules to follow.
50 Your battery has a life cycle- lets say 800 full charges if you only use 50 of that power each time and charge it when it gets to that point then technically it would last 2000 charges.
For charging and discharging the battery likes to be warm. Theres no absolute rules to follow. When the battery gets close to 100 the BMS kicks in and slows the charge down to bal. Well it might be time to change your iPhone battery.

