Swollen phone battery: is it dangerous?
Yes, a swollen lithium battery can be dangerous. Gas building up inside the cell pushes the back or screen outwards, and a damaged cell can overheat or catch fire. Stop charging it and have it replaced.
Written by Zojari technicians with 12+ years of phone repair experience
Signs you may notice
- Back cover lifting or bulging
- Screen pushed up at one edge
- Phone rocks when laid flat
- Phone hot when idle
What to do right now
- Stop charging the phone.
- Don't press on the bulge or try to push it back.
- Keep the phone away from beds, cushions and heat.
- Back up your data if the phone still works.
Stop and bring it in if…
- The battery smells sweet or chemical
- The phone is hot when switched off
- You see smoke or hissing: move it away from anything flammable and don't touch it
What usually causes it
One symptom can have several causes. These are the most common ones.
Battery age
Cells wear and can swell after hundreds of charge cycles.
Heat
Charging in hot places or under pillows.
Poor chargers
Unstable charging can stress the battery.
Physical damage
Drops can damage the cell.
What our technicians do
We remove swollen batteries carefully without puncturing them, then check the screen, frame and board for damage the swelling may have caused before fitting a new battery.
Request a quotationCommon questions
Can I keep using a phone with a swollen battery?
It's not safe. Stop charging it and have the battery replaced as soon as possible.
Did the swelling damage my screen?
Sometimes. Pressure can crack screens or damage the display, which we check during the battery replacement.
Other repair guides
- Phone not charging or charging very slowly?Phone doesn't respond when plugged in · Cable only works when held at an angleRead the guide
- Phone keeps restarting on its own?Restarts while you are using it, often under load (camera, games, calls) · Gets stuck on the brand logo and restarts again (boot loop)Read the guide
- Phone dropped in water or had a drink spilled on it?Phone switched off or won't turn on after getting wet · Lines, spots or flicker on the screenRead the guide
- No network, no service or SIM not detected?'No service' or 'Emergency calls only' · 'No SIM' or 'Invalid SIM'Read the guide
- Screen stays black during calls, or you hang up with your cheek?Screen stays black during a call and you can't hang up · Your cheek mutes or ends callsRead the guide
- Callers can't hear you, or you can't hear them?Callers say you sound far away or can't hear you · You can only hear callers on loudspeakerRead the guide
Your Device Deserves Expert Care.
Over 12 years of phone repair experience in Kampala. Tell us what’s wrong and a technician will recommend the right repair. No fix, no fee.