The Samsung Galaxy S21 Plus works hard, and its battery is usually the first part to wear out. A replacement is a cost-effective way to extend the life of a phone that is otherwise sound. We dispose of the old cell responsibly and fit a fresh one.
- Turnaround: 1 working day, subject to stock and workload
- 6-month warranty on this repair
- Walk-in near Liverpool Street Station or UK mail-in service
Signs your Samsung Galaxy S21 Plus needs this repair
- Slow or stalling charging
- Shutting down with charge still showing
- Draining far faster than it used to
- Screen or back lifting from a swollen cell
- Needing a top-up by midday
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 Samsung Galaxy S21 Plus before any work begins. If you are unsure which repair you need, our team will advise.
Before you book
- If the screen or back is already lifting, the cell may be swollen, so book promptly and avoid charging it.
- If the phone has been opened before, we inspect the seals and connectors as part of the job.
- If the phone has had liquid exposure, a battery may not resolve everything and we check first.
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
- Quality parts matched to your device
- Every repair tested before it is handed back
- Walk-in and UK mail-in both available
- No data loss, this is a hardware repair
Related Samsung Galaxy S21 Plus repairs
Frequently Asked Questions
How long does it take?
Often the same day where the cell is in stock. We confirm at booking.
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.
Is the battery replacement guaranteed?
Yes. The warranty for this repair is shown on the page and applies to the fitted battery.
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.
Will I lose my data during a battery replacement?
No. It is a hardware-only procedure and your data stays exactly as it is.