iOS 10 vs iOS 11 vs iOS 12: Which iOS Version Offers the Best iPhone Battery Life?

Every year when Apple releases a new iOS version, most users end up having the same complaint: the previous version offered better performance and battery life. Apple addressed the performance issues head-on with iOS 12 last year as it brought about major performance improvements even on older iPhones, though that performance came at the cost of slightly worse battery life.

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