- After payment, we order this part specifically for your repair.
- It usually arrives within 1 working day.
- We contact you the same day it arrives to book your fitting.
iPhone 12 Battery Replacement
If your iPhone 12 battery drains too quickly, shuts down unexpectedly, or shows a service battery warning, Square Repair can replace the battery at our London workshop near Liverpool Street.
- Turnaround: same-day service is usually available when stock is confirmed, with 2 Hour Express available when pre-booked.
- Warranty: 6-month warranty on iPhone battery replacements.
- Service options: walk-in by appointment, UK mail-in repair, or London courier where available.
Choose your battery option
Use the selector above to choose between Premium Battery and Genuine Apple Battery. The premium battery option is the lower-cost route. The genuine Apple option is best when you want the closest supported Apple battery experience on eligible iPhones.
Common iPhone 12 battery faults
- Battery health has dropped and service is recommended
- The phone drains quickly, powers off early, or restarts under load
- Charging appears normal but battery life remains poor
- The phone feels hot during basic use
- The battery is swollen or the screen is lifting
What is included
- Replacement battery fitted to your selected option
- Charging and power testing after repair
- Basic function checks before return
- Your data stays on the device during the repair
Not sure if the issue is battery related? Book a mobile phone diagnosis first or view all iPhone 12 repair options.
Before you book
- If we discover water damage during your repair that affects the work, we will stop and let you know. A water damage diagnosis is applicable at the current fee, and we will confirm this with you before we proceed.
Repair options and related services
Frequently Asked Questions
How do I know whether the iPhone 12 battery needs replacing?
Rapid drain, unexpected shutdowns, battery-percentage jumps or swelling can indicate a worn or faulty battery. We check the symptoms before fitting the replacement.
Will a battery replacement erase my data?
No. Battery replacement is a hardware repair and does not normally require a factory reset. Keeping a current backup is still sensible before any repair.
What battery option will be fitted?
The available option is shown on the product page. Where more than one option appears, compare the descriptions and choose the option that suits the repair.
How long does the repair take?
This product is set up for same-day fitting. Book before travelling so we can confirm the repair slot and the current part availability.
Can I use the walk-in or mail-in service?
Yes. Book a walk-in visit near Liverpool Street Station or send the device through the UK mail-in service.
What warranty is included?
The completed battery replacement includes a 6-month warranty covering the fitted battery and workmanship, subject to the warranty terms.