iPhone Repair Term

Battery Health

How much charge capacity your iPhone battery retains

Battery health is a percentage showing how much charge capacity your iPhone battery retains compared to when it was new. A new battery is 100%. Below 80% means significant degradation — Apple also enables performance throttling at this point to prevent unexpected shutdowns. Check it under Settings → Battery → Battery Health & Charging.

Why It Matters For Your Repair

Below 80% battery health, iOS throttles the CPU to prevent unexpected shutdowns — meaning your iPhone feels slower even though the processor is fine. Singapore’s heat accelerates degradation: a device left in a hot bag or used outdoors extensively can reach 80% within 18 months. Battery replacement is one of the most cost-effective iPhone repairs and instantly restores performance.

Health Thresholds

100–80%

Normal. No throttling.

79–70%

Throttling active. Replace soon.

Below 70%

Replace immediately.

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