After updating to iOS 13, my iPhone battery is draining very fast. How can I improve the battery life now? - Quora
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Why is my iPhone showing an “Important Message” or “Unknown Part” warning from Apple? – Back Market - Help Center - USA
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iOS 16.1 Adds Battery Percentage to iPhone 13 Mini, iPhone 12 Mini, iPhone XR, and iPhone 11 Status Bar - MacRumors
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