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Apple replaced my iPhone 11 battery free of charge. My warranty was already expired. – Rienk Jan Schurer
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Apple Releases iOS 14.5 Beta 6 to Developers, Includes Battery Health Calibration for iPhone 11 Line « iOS & iPhone :: Gadget Hacks
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Some iPhone 11 Users Seeing Increased Battery Health Percentages After iOS 14.5 Recalibration Process - MacRumors
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