Dynamic Island shows incorrect battery charge percentage upon restart of iPhone

[uandme72]

Dynamic Island shows incorrect battery charge percentage upon restart of iPhone- it shows charge value as 10% even if the actual value is 1%.

Whenever the iPhone is restarted, after few moments the Dynamic Island automatically shows the value of battery charge percentage. This charger percentage always shows incorrect value of 10% even if the actual charge status is far less than 10%. For example if the actual charge value is 1% even then the Dynamic Island shows charge value of 10% after restart of iPhone.

 

[chabig]

And it fixes itself soon after, right? No problem. You have to allow some time for the software to work.

 

[raythompsontn]

Dynamic Island shows incorrect battery charge percentage upon restart of iPhone

What method are you using to determine the actual charge?

 

[Mr. Awesome]

Dynamic Island shows incorrect battery charge percentage upon restart of iPhone- it shows charge value as 10% even if the actual value is 1%.

Whenever the iPhone is restarted, after few moments the Dynamic Island automatically shows the value of battery charge percentage. This charger percentage always shows incorrect value of 10% even if the actual charge status is far less than 10%. For example if the actual charge value is 1% even then the Dynamic Island shows charge value of 10% after restart of iPhone.

What you’re talking about is the “low battery warning”. Normally this only shows up as your battery percentage drops from 11% to 10% or below. The same thing happens when it drops to 20%. It’s intentional that this doesn’t show the actual percentage, as it usually only triggers when the percentage is actually at 10 or 20. The warning is just getting triggered internally for some reason when you restart your phone.

 

[thejadedmonkey]

And it fixes itself soon after, right? No problem. You have to allow some time for the software to work.

That's just sloppy on Apple's part though.

 

[CMoore515]

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[uandme72]

What method are you using to determine the actual charge?

The actual charge is taken from what is shown on the battery icon on status bar at the top right of screen.
The Dynamic Island charge is what is shown just after restart in the Dynamic Island expansion.
Both screen shots attached.

 

[raythompsontn]

The Dynamic Island charge is what is shown just after restart in the Dynamic Island expansion

It probably takes several seconds for all the modules to do what needs to be done and refresh the displayed values. If the number agree after a minute, then there is no issue.

 

[MacCheetah3]

Based on your screenshots, I still think this is it:

What you’re talking about is the “low battery warning”. Normally this only shows up as your battery percentage drops from 11% to 10% or below. The same thing happens when it drops to 20%. It’s intentional that this doesn’t show the actual percentage, as it usually only triggers when the percentage is actually at 10 or 20. The warning is just getting triggered internally for some reason when you restart your phone.

I have certainly seen this seemingly delayed alert notification on my iPhone X. Sometimes, it was because the alert wasn’t triggered — maybe a glitch, maybe something else — before the shutdown. So, then, the OS seems to think, “we missed this, better tell the user” and shows it upon restart. Another instance is if the threshold (i.e., 10% charge) happens while the device is off. For example, you shut down your iPhone with 12% battery charge and when you turn it back on, the charge is at 2%, the 10% warning will appear because, technically, at some point the battery charge did drop to 10%, triggering the alert. The second scenario isn’t consistent, in my observation but has happened.

In other words, put simply, the 10% (and 20% on some devices) is hardcoded into the alert.

 

[uandme72]

Based on your screenshots, I still think this is it:

I have certainly seen this seemingly delayed alert notification on my iPhone X. Sometimes, it was because the alert wasn’t triggered — maybe a glitch, maybe something else — before the shutdown. So, then, the OS seems to think, “we missed this, better tell the user” and shows it upon restart. Another instance is if the threshold (i.e., 10% charge) happens while the device is off. For example, you shut down your iPhone with 12% battery charge and when you turn it back on, the charge is at 2%, the 10% warning will appear because, technically, at some point the battery charge did drop to 10%, triggering the alert. The second scenario isn’t consistent, in my observation but has happened.

In other words, put simply, the 10% (and 20% on some devices) is hardcoded into the alert.

Assuming this to be true- that the 10% (or 20%) figures are hard coded into the alert, the scheme is not the ideal or desired behaviour. Maybe for future, Apple can make it dynamic to reflect the true charge figures instead of relying on the status hard coded values shown in alerts.

 

[MacCheetah3]

Assuming this to be true- that the 10% (or 20%) figures are hard coded into the alert, the scheme is not the ideal or desired behaviour. Maybe for future, Apple can make it dynamic to reflect the true charge figures instead of relying on the status hard coded values shown in alerts.

Indeed, although, as @Mr. Awesome stated, the intention is for these alerts to be activated immediately when battery charge reaches the chosen level of warning (i.e., 10%/20%).

 

[Mr. Awesome]

Assuming this to be true- that the 10% (or 20%) figures are hard coded into the alert, the scheme is not the ideal or desired behaviour. Maybe for future, Apple can make it dynamic to reflect the true charge figures instead of relying on the status hard coded values shown in alerts.

Indeed, although, as @Mr. Awesome stated, the intention is for these alerts to be activated immediately when battery charge reaches the chosen level of warning (i.e., 10%/20%).

Agreed. Again, usually this isn’t an issue, it’s just a consequence of the phone checking the battery level when it starts up and then realizing “oh it passed 20, let’s show the 20% battery warning”. It would theoretically be trivial to make it show the actual percentage. It may be slightly confusing to get a low battery warning at a seemingly random percentage, but that is probably the ideal behavior here.