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Check \'Battery Health\' in Settings if your iPhone battery drains fast

iPhone users can check battery health in the Settings menu to gauge device condition and when a battery replacement may be needed. Apple provides a built-in feature that shows battery ageing without requiring a separate app. Battery wear can be assessed through maximum capacity and the number of charge cycles. The menu path varies by model, but the information can also help when buying a used iPhone and monitoring long-term performance.