Does Limiting iPhone Charging to 80% Really Extend Battery Life? The Answer May Surprise You

German site Macwelt conducted a statistical analysis to determine if limiting iPhone charging to 80% actually extends battery life. They collected data from iPhone 15 users who charged their devices to either 80% or 100%. The results showed that those who charged to 100% had measurably lower battery health after one year, which was found to be statistically significant.