OnePlus 8 Battery Replacement
If your OnePlus 8 is dropping charge faster than it used to, switching off at higher percentages, or only behaving when it’s on the charger, a fresh battery can make it feel dependable again. Our OnePlus 8 battery replacement is typically completed in around 2 hours for walk-in appointments (subject to availability), and every battery replacement is covered by a 6-month warranty. Repairs are carried out in London, UK, close to Liverpool Street Station.
Book in when it suits you: make a booking online for a quick drop-off, or use our UK mail-in option if you’re not local.
Why Choose Square Repair?
- Experienced technicians repairing OnePlus devices daily
- OEM-quality replacement batteries fitted carefully and tested properly
- 6-month warranty included on battery replacements
- Honest diagnosis if we spot anything else affecting power or charging
- UK-based service with walk-in and mail-in options
Common Issues We Fix
- Battery draining unusually quickly, even with light use
- Unexpected shutdowns, sometimes while showing plenty of charge
- Charging that feels slow, inconsistent, or stops and starts
- Phone overheating during charging or normal use
- Swollen battery symptoms (lifting screen, pressure, or creaking back)
Our Repair Process
- We confirm the exact model and check the symptoms you’ve described
- The phone is opened carefully using the right tools to protect the frame and seals
- The old battery is removed safely and replaced with a fresh unit
- We reassemble the device and run checks for charging, stability, and normal use
- We let you know as soon as it’s ready for collection or dispatch
How to Verify Your Device
OnePlus models can look very similar, so it’s worth confirming you have a OnePlus 8 before booking:
- Go to Settings > About device and look for the model name.
- Check the Model number. OnePlus 8 variants often include codes like IN2010, IN2011, IN2013, IN2015, IN2017, or IN2019.
- If you’re unsure whether it’s an OnePlus 8, 8 Pro, or 8T, book anyway and we’ll confirm the exact model before any work starts.
Internal Links
- OnePlus 8 repair options (screen, battery, charging and more)
- OnePlus 8 screen replacement service
- OnePlus 8 charging port repair
- Browse all OnePlus repairs at Square Repair
- Book a repair appointment online
Get Started Today
Bring your OnePlus 8 back to reliable, all-day power with a professional battery replacement in Central London. Book online for a fast turnaround near Liverpool Street, or choose mail-in service if you’re elsewhere in the UK.
Frequently Asked Questions
What are the signs the OnePlus 8 battery needs replacing?
The usual signs are a battery that drains far faster than it used to, unexpected shutdowns even when there is charge left, and the device only running reliably while plugged in. You may also see sudden percentage drops, the device running warm, or slow charging. Your device's battery or device-care settings will often show declining capacity. If the back or screen is lifting, treat it as urgent, as that can mean the battery has swollen.
Check current turnaround and reserve a slot on our booking page.
How long does a OnePlus 8 battery replacement take?
Most OnePlus 8 battery replacements are completed the same day when the part is in stock, often within a couple of hours of dropping in near Liverpool Street Station in London. We inspect the device first and confirm the timeframe before starting any work. Mail-in customers can post the device from anywhere in the UK and we turn it around as quickly as the post allows.
Not sure? It is worth booking a quick diagnosis first.
What battery do you fit in the OnePlus 8?
We fit a quality replacement battery matched to the OnePlus 8 and test charging, power stability and capacity before return. Replacing the battery restores the runtime the device had when it was newer and resolves shutdowns caused by a worn cell. Every battery replacement carries a 6-month warranty.
See exactly how we work on our how we work page.
Will my data be wiped when the battery is replaced?
No. A OnePlus 8 battery replacement is a hardware-only repair, so your photos, apps and settings stay exactly as they are. We still recommend a recent backup beforehand as good practice, in case the device has damage beyond the battery. Nothing about the battery procedure touches your storage.
Have a question first? contact us.
Is a swollen or bulging battery dangerous?
A swollen battery is a safety issue and should be dealt with promptly. Stop charging the OnePlus 8, avoid pressing on the bulge, and arrange a replacement as soon as you can. Swelling can lift the screen or back panel and, left too long, can damage nearby parts. Bring it in or post it to us and we will replace the battery and check the surrounding components.
It is also worth checking your OnePlus 8 screen repair.
What warranty comes with the OnePlus 8 battery replacement?
Every OnePlus 8 battery replacement includes a 6-month warranty, which covers the replacement battery and our fitting. If a warranty-covered fault appears within that period, we put it right at no extra cost. The warranty does not cover fresh liquid exposure or new accidental damage, which we always explain before you book.
Prefer to look around first? Explore OnePlus 8 charging port repair.