Anyone charge to 100% before bed…

[Peter Franks]

with literally no good or explainable reason why you wake up to it being at 20%. I took it off charge after it reaches 100%, like usual, and ....
No background activity, no location services, (all off) just 30 mins of audio, which turned off after the 30 min countdown, which I do every night, and its always still on 97% ish by morning. Battery health is at 90% on a standard iPhone 14.

Curious if there is any logical answer. Checked usage in battery settings, and nothing relevant is there to overnight use.
Thanks for any heads up.

 

[russell_314]

with literally no good or explainable reason why you wake up to it being at 20%. I took it off charge after it reaches 100%, like usual, and ....
No background activity, no location services, (all off) just 30 mins of audio, which turned off after the 30 min countdown, which I do every night, and its always still on 97% ish by morning. Battery health is at 90% on a standard iPhone 14.

Curious if there is any logical answer. Checked usage in battery settings, and nothing relevant is there to overnight use.
Thanks for any heads up.

From my understanding, you’re saying that it normally is 97% or so when you wake up but this one time it was 20%?

The only thing I could think of would be, it was struggling to pick up a cellular signal. A phone that has a weak cellular signal will burn through battery quickly trying to maintain that signal.

I usually plug mine in at night and unplug it in the morning. It charges to 80% then knows what I’m about to wake up so charges the remaining 20% right before then, so the battery doesn’t have to stay at 100% for very long.

 

[MBAir2010]

i100% is the result i always keep my  things since 2004ish.
im not used to that 80% battery limit on the M1 MBA
but i just under-mind that message .

seems to me these electronic devices wont over-charge
including bicycle gears now, as shinamo™ has a shut off when 100%.

 

[Peter Franks]

From my understanding, you’re saying that it normally is 97% or so when you wake up but this one time it was 20%?

The only thing I could think of would be, it was struggling to pick up a cellular signal. A phone that has a weak cellular signal will burn through battery quickly trying to maintain that signal.

I usually plug mine in at night and unplug it in the morning. It charges to 80% then knows what I’m about to wake up so charges the remaining 20% right before then, so the battery doesn’t have to stay at 100% for very long.

Thanks yeh, Funnily enough, I've had the 'low signal' on the phone for years, but in the list of previous 24 hours, it wasn't listed. Only in the last 10 days list. I can't see anything that would have caused it. Last night I turned off cellular and wifi, and it was OK today, kind of. Still in the 60s, but not 20. Something is afoot...

 

[Ctrlos]

I know you have location services turned off but do you have Find My turned on? A bug with this on my 12 Max was hoovering up battery. Since turning it off things are much better.

 

[Peter Franks]

I know you have location services turned off but do you have Find My turned on? A bug with this on my 12 Max was hoovering up battery. Since turning it off things are much better.

I think, from memory. When you turn off location services, it still said if you turn off ‘find my’ its still active?