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 High-Quality Replacement Battery and Genuine Apple Battery. The High-Quality Replacement Battery 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.
Check your model
Model numbers covered: A2172, A2402, A2403 and A2404 (iPhone 12). To check yours, go to Settings, then General, then About, and tap Model Number to show the number starting with A.
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 part is fitted in the iPhone 12 battery repair?
You choose the battery when you book: our High-Quality Replacement Battery or a Genuine Apple Battery. Both are made for the iPhone 12 and fitted at our Liverpool Street workshop.
How long does the repair take?
The High-Quality Replacement Battery is usually fitted the same day. The Genuine Apple Battery is ordered after payment and usually arrives in 1 working day. We contact you to arrange fitting once it arrives.
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.