iPhone Battery Health Starts With Temperature
Look at the charging environment before chasing a perfect percentage.
The essentials
Apple identifies temperature history and charging patterns as factors in battery aging. Full discharge is unnecessary before charging. Optimized charging reduces time spent fully charged.
Put it into practice
Check where the phone charges. Avoid a hot car or trapped heat, and respond to temperature warnings. Apple warns that use or charging above 35°C ambient temperature can permanently reduce lifespan.
What to check
Record screen time, recent app changes and charging heat for a few days. This helps separate changing usage from a battery concern. Ask for evidence when a tip promises permanent battery health from one percentage rule.
