HomeReadiphone-battery-calibration-mythGuidesiPhone Battery Calibration: Why Draining to 0% Is a MythShould you drain your iPhone to 0% to recalibrate? No. This 1990s advice harms modern lithium-ion batteries. Here is what actually helps.ccelltech TeamExpert TechniciansUpdated February 7, 20267 min readVerified February 2026Was this article helpful?YesNoPreviousGuidesiPhone Battery Swelling: Warning Signs, Safety, and What to DoNextGuidesThird-Party vs Apple iPhone Battery: Quality, Safety, and Price ComparedFound this helpful? Share it: