A worn Samsung Galaxy A40 (SM-A405FN) battery can shut the phone down early, charge slowly or swell over time. We fit a quality replacement and check charging and power stability before returning it. 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 A40 (SM-A405FN) needs this repair
- Only reliable while plugged in
- Slow or stalling charging
- Shutting down with charge still showing
- Percentage jumping around
- Screen or back lifting from a swollen cell
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 A40 (SM-A405FN) before any work begins. If you are unsure which repair you need, our team will advise.
Before you book
- If the phone has had liquid exposure, a battery may not resolve everything and we check first.
- 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 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.
Our repair process
- Start the repair: book online or visit us near Liverpool Street Station.
- Send or bring the device: mail-in is available across the UK.
- Fit and verify: we complete the repair and run a function check.
- Hand back: collect in person or we return it by tracked courier.
Why choose us
- Walk-in and UK mail-in both available
- No data loss, this is a hardware repair
- Every repair tested before it is handed back
- Quality parts matched to your device
Book your repair
Walk-ins are welcome during opening hours near Liverpool Street Station. For mail-in repairs, book your repair online so we can track your device from arrival. Any questions? Contact us and we will help.
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Frequently Asked Questions
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.
Is the battery replacement guaranteed?
Yes. The warranty for this repair is shown on the page and applies to the fitted battery.
Do you recycle the old battery?
Yes, the old cell is disposed of responsibly.
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.
Can I walk in or post it?
Both. Walk in near Liverpool Street Station or post it with tracked return.
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.