[Daniel_sk]

iOS will not fully charge your battery during the night - it will top off the battery just before you usually take it off the charger in the morning (it learns your usual schedule + it probably also makes sure the battery is ready based on your alarm settings).

[lesinski]

This feature doesn’t help. The problem is that the phone is still using energy during the night, draining the battery by, for example 8-10%. Over several nights, this adds up to 1 cycle.

The fact that the OS waits to top up the battery just hides how much energy it used on background activity and notifications during the night.

[snthd]

In the US there's also an iOS charging option that considers the local grids carbon intensity.

https://support.apple.com/en-gb/guide/iphone/iphc49d61e92/io...