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iPhone Battery Health Explained
What iPhone battery health percentage means, when to worry, and how it affects refurbished buying decisions.
What is battery health?
Apple's Battery Health shows maximum capacity relative to when the phone was new. 100% means full capacity; 80% means the battery holds 80% of its original charge.
What percentage is acceptable?
Above 85% is good for a refurbished phone. Below 80%, expect noticeably shorter battery life and consider a replacement ($69–99 at Apple).
Buying refurbished: what to look for
Reputable sellers guarantee minimum 80–85% battery health. Always check the return policy if battery performance doesn't meet expectations.
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