Battery 101
What the icons mean, how to check health, and how to make a charge last.
Why Is My iPhone Battery Yellow? (And How to Fix It)
Battery Health: How to Make Your Phone Last Longer
Battery health affects daily runtime, charging, and resale value. Learn what lowers it, how to check it, and which charging habits actually help on your phone.
MacBook Battery Health Check and Care Guide
Check MacBook battery health, read cycle count and condition status, reduce wear, and decide when battery service or replacement makes sense for your Mac.