An iPhone battery does not last forever. Every charge cycle wears it a little. Your iPhone keeps track of this and shows it as a percentage. Here is how to read it.
Where to find it
Go to Settings → Battery → Battery Health (on some iOS versions: Battery Health & Charging). On recent models you also see the number of charge cycles and the date of manufacture.
What "Maximum Capacity" means
This is how much charge the battery can hold compared with when it was new. At 100% it holds the full amount; at 85% it holds 15% less, so a full charge lasts noticeably shorter. Apple designs its batteries to keep about 80% of their capacity after a certain number of full cycles – after that, the decline usually becomes clear in daily use.
"Peak Performance Capability"
This line matters as much as the percentage. If it says your battery supports normal peak performance, all is well. If it says your iPhone has unexpectedly shut down and performance management has been applied, the battery can no longer deliver enough power at peaks. The phone slows itself down to avoid shutting off. A new battery restores full speed.
When to replace
- Maximum capacity around 80% or lower.
- The phone shuts down at 20–30%, especially in the cold.
- You charge more than once a day with normal use.
- "Service" is shown under Battery Health.
- The phone feels slower than before and performance management is on.
- Immediately: if the screen lifts or the back bulges. That is a swollen battery – stop charging and bring it in.
How long does a replacement take?
An iPhone battery replacement is often done in 20 to 30 minutes while you wait. Your data stays on the phone. You get a fixed price before we start and a 1-year warranty on the battery we fit.
After a battery replacement, some iPhone models show a message about the part in Settings. Read what it means: iPhone parts messages after a repair.
Prices per model: iPhone battery replacement
Visit PhonePlus
PhonePlus, Binnen Bantammerstraat 4, Amsterdam – near the Nieuwmarkt and about ten minutes' walk from Centraal Station. Walk in without an appointment: free diagnosis and a fixed price before we start.
- Monday: 10:00–19:00
- Tuesday to Saturday: 11:00–21:00
- Sunday: 12:00–21:00
