"Find my" notification drained my iPhone to 0% battery. Consequences?

[Synna]

I recently switched off my iPhone 12 Pro Max, as it was low on battery and I wasn't able to charge it right away. I was surprised when it said that the battery was completely empty when trying to switch it on today. I then realized that it probably had to do with iOS 15, which displays an info about "Find my" before turning it off for the first time after the update, so I probably didn't see the info and the phone stayed on until it was completely empty.

My question is: Can a single complete discharge already damage the battery? So far, I have only drained it to about 20% every time. At the moment, it still sits at 100% battery health, but I am not sure if this metric gets updated immediately after such an incident.

 

[velocityg4]

It gets updated when you charge it. It might have caused more wear than normal. But you’d have to do it multiple times to notice a different wear rate.

 

[chabig]

I then realized that it probably had to do with iOS 15, which displays an info about "Find my" before turning it off for the first time after the update

I doubt that Find My uses very much power. When the phone is off, I would expect that battery to last for days (maybe even a few weeks) even with Find My doing it's thing.

 

[Synna]

It gets updated when you charge it. It might have caused more wear than normal. But you’d have to do it multiple times to notice a different wear rate.

Thanks, that's a good info, since it still sits at 100% after charging, it should be fine then.

I doubt that Find My uses very much power. When the phone is off, I would expect that battery to last for days (maybe even a few weeks) even with Find My doing it's thing.

Sorry, I didn't describe it accurately. Since iOS 15, "Find My" can find an iPhone that's off. When you switch your iPhone off (e.g. slide to shut down) for the first time after installing iOS 15, a notification will pop up telling you about this and you have to actively acknowledge and then "slide to shut down" again for it to shut down. What happened to me was that I did a "slide to shut down" and walked away, not realizing that the notification was there and the shut down would not be performed and when I came back, battery was completely drained due to the iPhone staying on.

 

[chabig]

What happened to me was that I did a "slide to shut down" and walked away, not realizing that the notification was there and the shut down would not be performed and when I came back, battery was completely drained due to the iPhone staying on.

Oh. I did misunderstand. Your battery should be fine. Your phone manages the battery intelligently. You can’t damage the battery.

 

[now i see it]

Battery will be fine. Whatever tiny degradation that happened to it will not be noticeable. If the battery was killed to zero every day for a month, then yeah, that wouldn’t be good, but once? No problem

 

[Synna]

Thanks so much for your replys, that's a relief.