If an iPhone 11 Pro is not turning on, it is important to troubleshoot the issue and try to determine the root cause. One of the first steps is to check the battery level and ensure the iPhone 11 Pro is charged. If the battery is completely drained, it may take some time to charge before the phone will turn on. 16. Nebucatnetzer • 4 mo. ago. Same here, all day in WiFi and battery is down to 29%. 11% is used by calendar o.0. 3. dcperin1 • 4 mo. ago. 16.4 has wrecked my battery life. It's probably taken 35-40% of my batteries normal capacity. By the time I get off work at 4pm I'm down to like 15%. 6. Reddit. A number of iPhone 12 Pro owners have taken to Apple's Support Forums to report an issue that sees excessive power draw from the handset's battery while idle, a problem that has cropped up While most of the initial iOS 16 bugs have been ironed out by Apple, one key problem still seems to persist exactly two weeks after iOS 16 was launched — iPhone battery life drain. Several users This is also indeed affecting my iPhone 15 battery drain issue after iOS 17.0.2. Device was on iOS 17 with no issue. Despise of battery drain issue, apple will soon release another update to also include a bug fixed to its iPhone 15 & iPhone 15 Pro lineups as well as some older iPhones affecting the cause of overheating when opening Uber Options. Sounds like a problem with the charge port (the original battery may not even need replacing) The phone only turns on because replacement batteries are usually (should be) shipped with some charge. I can't explain the zero percent indication though, other than that there maybe issues with your replacement batteries. With iOS 14.5, Apple introduced a new battery health recalibration feature for iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max. The new feature allows the system to recalibrate the battery health Jan 13, 2022. #1. Hello guys! This is my first thread, I'm just gonna share my problem with my iPhone 11 pro, mainly about its battery percentages jumping around, it been doing like that so much, I've been trying to contact apple support but they ask me to reinstall the whole iOS, and I already did it and it still doesn't work, today they told .

iphone 11 pro battery issues