How to stop IOS 11 battery full beeping

There is no notification or beep when the phone is fully charged, regardless of the iOS version. There is a problem with the charging cable, the power source, or lint and debris in the lightning port. Clean out the port and / or have the cable and charger checked or replaced.

ianinPF wrote:

Well I do agree that there should be no "battery full" beep. What I think I'm seeing is the "start charging" beep happening over and over again.

Yes, that is almost certainly what is happening. It's certainly worth looking into why that is happening. I can think of several possibilities (most already mentioned in this thread).

• The phone stops charging when it reaches 100%. It will start over if the state of charge drops by 5%, but this won't normally be treated as "start charging" by the phone, because the power source is still connected. Some power sources will actually turn off if the current demand goes to zero (Apple USB adapters do not, but I have one that does; it's an external battery pack). In that case, current will come back on and the phone will see it as a "new" charge condition.
• A defective Lightning cable. There are 4 microcircuits in the phone end connector; if one of them fails it might cause a new start charging signal (just speculation), but changing the cable should fix it.
• An intermittent physical connection to the phone, usually the result of dirt accumulating in the phone's connector, or wear on the cable end. Cleaning the connector carefully with a bright light and a pointed tool would fix it.
• Unstable AC power. More common than you might think. A subsecond power interruption wouldn't be noticed by most people (especially at night). Related, an appliance with a heavy starting current (furnace, refrigerator, etc) and old wiring can cause a momentary dip in voltage; Apple devices will disconnect if the voltage drops below 100 volts for more than a few seconds; so will most 3rd party USB power sources.
• Uncertified (MFI certification) and unstable USB power sources. Some of these are actually physically dangerous; there are at least two cases of users being electrocuted by cheap USB power sources that do not provide line-load isolation.
• A hardware defect in the phone; specifically, the U2 Tristar chip that manages charging, or a defective battery.

I am also having this problem with my brand new IPhone X (so I am 99.9999% sure it is not lint in the charging port!) and am using non-apple charger and lightning cable - so this may be a problem. I have found a workaround that stops the phone from beeping at night when reaching full charge:

http://osxdaily.com/2017/04/24/silently-charge-iphone-ipad-no-sound-buzz/

Viskas1 wrote:

The problem has nothing to do with an “intermittent connection” no matter how often you repeat it. The sound only occurs once the charge is full; intermittent connection sounds alarm regardless of charge level. The sound only occurs on lock screen, not when an app is open; intermittent connection doesn’t care what the phone is doing. With 6 chargers in different places including Apple original, it’s not the charger.

No working iPhone anywhere in the world has ever beeped when the battery is full. It only beeps when it is connected to power. So if it is beeping when full the only logical and correct explanation is that the power source turns off when the phone reaches full charge, then turns back on if the state of charge falls below 100%. A lot of 3rd party power sources to this, so it isn't surprising. This has been stated, correctly, over and over, in this thread.

The iPhone does not have a tone when the battery is full. If you are experiencing a tone on your phone you don't recognize, then make a Genius Bar appointment and have the device checked. Something is either wrong with the phone, your have a notification that you are not aware of, or there is a problem with the cable. You can check one of the other cables you use with the other phones that don't have a tone. If that doesn't work, then the Genius Bar is what you need, since the iPhone does not have a full battery tone.

Lawrence Finch wrote:

Viskas1 wrote:

The problem has nothing to do with an “intermittent connection” no matter how often you repeat it. The sound only occurs once the charge is full; intermittent connection sounds alarm regardless of charge level. The sound only occurs on lock screen, not when an app is open; intermittent connection doesn’t care what the phone is doing. With 6 chargers in different places including Apple original, it’s not the charger.

No working iPhone anywhere in the world has ever beeped when the battery is full. It only beeps when it is connected to power. So if it is beeping when full the only logical and correct explanation is that the power source turns off when the phone reaches full charge, then turns back on if the state of charge falls below 100%. A lot of 3rd party power sources to this, so it isn't surprising. This has been stated, correctly, over and over, in this thread.

I use a mophie wireless charging case on my iPhone 7+. Love the case; hate the charging pad that came with it. Unless I position the phone absolutely precisely, it will beep every other minute.

Kedrose wrote:

My new iPhone X does the same, and my experience is the same as other posters - not the connection! So frustrating as it wakes me up. I’ve posted on the Apple feedback page and hope lots of others will too

Posting it in the Apple feedback page isn't going to be helpful in this case. Feedback is not for issues where phones are working in a way that they are not designed to work. If your phone is beeping when it completes charging, it (or the adapter or the cable) is malfunctioning. You deal with that through Apple Support.

I have a couple of wireless charging pads that give me a problem. For no good reason, they stop and start and stop and start, beeping every time. Your problem is a little bit less severe, I think. I suspect what is happening is that, once the phone reaches 100%, it stops charging, as it's supposed to. However, the charger starts charging again almost immediately, causing the beep. The problem is almost definitely with the charger. The chargers I have that cause the problem are by Mophie. The Verizon brand one (not cheap) I have is not a problem unless the phone I manage to put the phone on it in such a way that it's not making good contact. Given that this is the one next to my bed, I manage to do that often enough. If I pick it up and set it back down, it's fine. If I don't, it behaves exactly as you're describing. The cheap, off brand charger on my desk at work works flawlessly. Go figure.

I’ve been having the same problem since I installed the last update 11.2.1

It is very annoying. The beeping starts when the battery is almost 100% and keeps it up every minute until I disconnect it from plug in power. I have tried it with multiple different power cords, outlets, and types of power, even computer and TV. So it is a bug in this program. I have not found a fix anywhere. We just have to convince Apple that they made a mistake in the update and it is not our power source. Seems they would notice that every iPhone owner is having the same problems with their plugs. Right?

I was having the same problem. Really mad I couldn’t charge my phone without this annoying problem. I have new iPhone 10 and brand new Anker wireless charger. It worked great until I upgraded my OS. Anyway I just plugged the charger pad into the wall USB adapter that came with my new iPad and it stopped. Still ridiculous but hope this helps.

There is something wrong. Check the charging port to make sure that there is nothing lodged in it such as lint. Try different cables if you have them. If it keeps beeping, take it back to the Apple Store. There is something wrong with your phone. It has nothing to do with iOS 11.x.

beckyfrombishop wrote:

I was having the same problem. Really mad I couldn’t charge my phone without this annoying problem. I have new iPhone 10 and brand new Anker wireless charger. It worked great until I upgraded my OS. Anyway I just plugged the charger pad into the wall USB adapter that came with my new iPad and it stopped. Still ridiculous but hope this helps.

For whatever reason, the phone isn't making a proper connection to the Anker charger. If it's new, I'd see if you can get it replaced.

If it's happening with a charging case connected, there's a problem with the connection it's making. Try charging with the regular cable and see what happens.

I should have thought of this earlier. I restarted the phone. Things seem better now.