"Installing a new OS on an iPhone triggers a lot of stuff to go on in the background, from indexing to recalibrating the battery, and this can go on for hours or even days," Adrian Kingsley-Hughes, a researcher at ZDNet.
"WTF is wrong with the latest iOS update?! My phone is dying every 7-8hrs despite being fully charged!" exclaimed one frustrated user on X.
"Till yesterday I was getting a good 17-18hrs of battery on one charge. How do I roll back 18.1.1?" reflected a user concerned about the drastic battery life change.
"On an iPhone SE2, the battery drains from 100% to 66% in 8.5 hours (with the screen locked)," noted another affected user.
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