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iPhone Battery Health: When to Replace, When to Wait
From the bench at iFixPhones — 15 E Central St, Franklin, MA 02038.
Check your number first
Settings → Battery → Battery Health & Charging. Above 90%: leave it alone. 85–90%: you'll start noticing on heavy days. Below 85%: a swap will genuinely feel like a new phone. Below 80%: Apple itself flags the battery as consumed — replace it.
Symptoms that override the number
Random shutdowns in the cold, the phone slowing down under load (throttling), or a battery percentage that jumps around — any of these mean the cells are done regardless of what the health screen claims.
Why a shop swap beats living with it
A 30-minute, warrantied battery swap costs a small fraction of a new phone and resets the daily-charge anxiety. We use quality cells, seal the phone properly, and back it for 6 months.