Degraded cells in the iPhone 12 Mini lose capacity quietly until the phone cannot hold a useful charge. A new battery is a quick, contained fix that leaves your data untouched. Power behaviour is checked end to end before return.
- Turnaround: Same day where possible, subject to stock and workload
- 6-month warranty on this repair
- Walk-in near Liverpool Street Station or UK mail-in service
Signs your iPhone 12 Mini needs this repair
- Needing a top-up by midday
- Slow or stalling charging
- Shutting down with charge still showing
- Screen or back lifting from a swollen cell
- Draining far faster than it used to
What is included
- Safe removal of the worn battery
- Fitting of a quality replacement cell
- Charging and power-stability testing
- Full function check before handover
- 6-month warranty
How to confirm your model
Check the model number in your device settings, or bring it in and we will confirm the exact iPhone 12 Mini before any work begins. If you are unsure which repair you need, our team will advise.
Before you book
- If the device is completely dead, we run a quick diagnosis before confirming the battery.
- If the phone has been opened before, we inspect the seals and connectors as part of the job.
- If the screen or back is already lifting, the cell may be swollen, so book promptly and avoid charging it.
Our repair process
- Tell us the fault: choose this repair or ask us to confirm it first.
- Walk in or post it: visit near Liverpool Street Station or send it from anywhere in the UK.
- We repair and test: the work is checked before the device is returned.
- Collect or receive by post: pick up in store or choose tracked return.
Why choose us
- Repair workshop near Liverpool Street, established since 2015
- Clear pricing with no hidden extras
- Quality parts matched to your device
- Walk-in and UK mail-in both available
Related iPhone 12 Mini repairs
Frequently Asked Questions
How do I know the battery is the problem?
Fast drain, early shutdowns, only running on the charger or a swelling cell are the usual signs. We confirm before any work.
Is it worth replacing rather than upgrading?
If the phone is otherwise sound, a battery is a far cheaper way to get reliable all-day use again.
How long does it take?
Often the same day where the cell is in stock. We confirm at booking.
What should I do if the battery looks swollen?
Stop charging it and book promptly. A swollen cell can push on the screen or frame.
Can I walk in or post it?
Both. Walk in near Liverpool Street Station or post it with tracked return.
How much runtime will I get back?
A fresh cell restores close to original runtime. We fit quality batteries and test charging before returning the phone.