Three years of 80% charge limits on iPhone have produced real data on battery wear, MacRumors reported.

The test looked at whether capping charging at 80% actually preserves maximum battery capacity.

Results show only modest improvements in capacity retention over standard charging.

Battery degradation still occurs despite the software limit, the article says.

Power users found they needed frequent top-ups during the day to get by.

High charge levels stress lithium-ion cells, so stopping early reduces strain during long charging.

Repair technicians say the inconvenience often outweighs the small gains for average users.

Modern systems already manage heat and charging speed, so the need for caps remains debated.

Read the full article on the results of three years of 80% charging.