-Battery drain on iPhone 14 Pro. What can I do to stop such a fast drain! (Running on iOS 16.1.1)-iPhone 14 Pro 16.1.1 has a lot of CPU intermediate ups and downs with app refresh on and off. This issue has been draining the battery very fast.-iOS 16 experience was bittersweet for me, more bitter than sweet. When 16.1 introduced a battery drain iOS 17.0.3 brought two patches for two security issues Apple identified within the software. If you want to read about the patches, head here. iOS 17.0.1 delivered three important patches to iPhone. After you update to iOS 14.5 on your iPhone 11, iPhone 11 Pro, or iPhone 11 Pro Max, you might see one of the following messages in Settings > Battery > Battery Health. Battery recalibrating. If you see the message below, it means the battery health reporting system on your iPhone is recalibrating. 1. Install the Latest iOS 14 Software Update. The battery issues on your iPhone might be due to a buggy build released by Apple. The assuring news is, the company is quick to release bug fixes via a firmware update. Go to the Settings menu and open General > Software Update and download the latest iOS 14 update. Battery Drain After iOS 17 Update on some old iPhones. Although iOS 17 brings exciting improvements, some users have encountered an unexpected issue after updating. Many iPhone users have reported Lastly, there’s Low Power mode, which disables things like the always-on display and limits the display refresh rate to 60Hz on ProMotion devices to save battery power for essential tasks. It So she has Iphone 11 PRO with 15.5 IOS. Phone recently started to act weirdly, suddenly it can turn off itself and after we launch it, battery get lower by 10-30% comparing to time before shut down. We checked battery capacity but it shows 100%. At first I thought that maybe battery is old and needs replacement but with 100% capacity I'm not so I bought the 12 pro max right when it was released and the first month I was amazed over the battery life. I would easily get 2 days sometimes almost 3 days on one charge. Then as I got iOS updates it got progressible worse. 14.3 was ok. 14.4 -14.6 have been horrible I get maybe one day with light to normal use and using exactly same apps as I 1. Excessive usage. If you are using your iPhone for heavy processing tasks like playing high-end games, streaming, using graphics-intensive applications, or recording videos for an extended iPhone 11 pro Battery drains so fast during sleep time while on airplane mode. Hi, guys, I recently discovered that whenever I turn my phone on airplane mode over night, the phone drains so fast. I admit that there were still some apps in the background, but the battery usage indicated that none of these apps was active during this time. ymWaY4.