How to check your iPhone battery health
Go to Settings > Battery > Battery Health. If Maximum Capacity is below 80%, or you see a “Service” message, the battery is worn and should be replaced.
Signs you need a new iPhone battery
- Battery drains fast or will not last a day
- iPhone shuts down at 20–30%
- The phone feels slow or hot
- The screen is lifting or the back is bulging. Stop charging and contact us straight away.
Good to know
On recent iPhones, Settings may show a notice about the battery after it is replaced. We explain your battery options before we start. Battery drain straight after an iOS update is often temporary: see iOS 27 battery drain.
Two ways to get it fixed
- Doorstep repair in Brighton and Hove, Worthing, Eastbourne, Hastings, Crawley, Horsham, Chichester and across Sussex. See areas.
- Mail-in repair from anywhere in the UK, with free postage both ways and £10 off.
Frequently asked questions
How long does an iPhone battery replacement take?
Usually under an hour at your door.
How do I know if my iPhone battery needs replacing?
Check Settings > Battery > Battery Health. Below 80% capacity or a Service message means it is worn.
Is there a warranty on iPhone batteries?
Yes, 12 months.