Unexpected shutdown

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Level 1

4 points

Unexpected shutdown

A few days ago my iPhone unexpectedly shutdown when the battery was around 20%. When it started up again, it had a warning message “This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. Performance management has been applied to help prevent this from happening again.” It has, however, happened a few times since then (without the message, but unexpected shutdowns when the battery is over 50%).

Battery health under settings shows max capacity 86% and the same above message under peak performance capability.

I’ve also in the last few days had messages about the iPhone not being activated, though I activated it ages ago. It’s an iPhone 8 that I bought new about 1.5 years ago.

I’m currently traveling in India and not connecting to my usual network/only to WiFi, if that would have any impact (or Indian outlet voltage? Though I have the standard converter)

Do I need a new battery? It would be unexpected after only 1.5 years...

iPhone 8

Posted on Jul 31, 2019 4:52 AM

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Answer 1

SravanKrA

Level 10

435,894 points

Jul 31, 2019 9:11 AM in response to nmco

Protect & Prolong life of your iPhone's Battery:

Put on Low Power Mode
Put Auto Lock On (1 min):- with low power mode it will be 30 Sec
Put Auto Answer Off
Disable Push notifications for apps you do not use often
Enable Auto Brightness:- Settings > General > Accessibility > Display Accommodations > Auto-Brightness [Enable]
Manually lower brightness from Control Center
If you Want to watch continuous Video. Stream it on TV or a Monitor
Don't force close apps; Apps which are not on frontend screen are paused by the system to save energy. Apps require more energy to re-launch. Apps which are open in the background use large memory is a myth and quitting them is counterproductive
Location services to be allowed only while using the app
Set your iPhone to fetch email and calendar data from internet less frequently
Turning off Background App Refresh
Charge before it drops below 20-30%
Try connecting to trusted Wifi where ever available in stead of Cellular
Enable Airplane mode in areas with bad cellular and wifi coverage. Your phone keeps trying for reconnection with the missing / weak network. This uses lot of energy
Switch off Wifi & Bluetooth while in Roaming or Not in Range
Enable "Wifi Assist" : Settings > Cellular or Settings > Mobile Data > Wi-Fi Assist [Enable]
Periodically Check your Battery Health (Settings > Battery > Battery Health)

iPhone Battery and Performance

https://support.apple.com/en-in/HT208387

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Unexpected shutdown

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