Quick answer: A swollen phone battery is a safety risk. Stop charging, switch the phone off, do not press, bend or puncture it, keep it away from heat and flammable things, and have a technician replace the battery as soon as possible. Do not keep using it. Junaid Telecom & Repairing Lab, Chiniot: WhatsApp 0345 7599995.
What does a swollen battery look like?
Lithium-ion batteries can swell when gas builds up inside the cell. The battery sits under your screen or back panel, so you often notice the phone first:
- The back cover or back glass is lifting or no longer sits flat.
- The screen is rising at the edges, or a gap appears between display and frame.
- The phone rocks on a table instead of lying flat.
- The case no longer fits or looks bulged.
- The phone feels unusually hot or shows odd battery behaviour.
- The touch screen or fingerprint sensor behaves strangely because the display is being pushed.
In phones with removable batteries, the battery looks puffy and does not sit flat, and may spin on a table.
Why do batteries swell?
Common causes include:
- Age and wear. Batteries degrade after many charge cycles.
- Heat. Hot cars, direct sun and hot pockets speed up damage. See our summer phone care guide.
- Poor chargers and cables. Unstable power stresses the battery. See why fake chargers are risky.
- Physical damage. Drops, pressure or a bent frame.
- Manufacturing defects or very low-quality replacement batteries.
- Overcharging and deep discharge habits in a poorly protected system.
What should I do immediately?
- Stop charging. Unplug the charger and cable right away.
- Switch the phone off. If it is hot or you smell something unusual, do it carefully and move away from it.
- Don’t press, squeeze, bend or puncture the battery or the phone. A damaged cell can overheat quickly.
- Move it to a safe place. Put it on a hard, non-flammable surface, like a tile or concrete floor, away from beds, curtains, paper, petrol and other flammables.
- Keep it away from heat and sun. Not in a car, not near a stove.
- Keep children and pets away.
- Arrange replacement quickly. Contact a repair shop and tell them the battery is swollen so they handle it carefully.
What should I NOT do?
| Don’t | Why |
|---|---|
| Keep using or charging the phone | A swollen battery is already damaged |
| Press the battery flat | Pressure can short the cell |
| Prick it to release gas | Puncturing is the classic path to fire |
| Heat it with a hair dryer or heat gun to remove it | Heat makes a damaged cell worse |
| Throw it in a household bin or burn it | Fire hazard and environmental harm |
| Put it in a bag or pocket | Heat or fire would be right next to you |
| Leave it in a hot car or in the sun | Heat can push a damaged cell into failure |
If the phone is smoking, very hot or hissing
Move away at once. If it is safe to do so, put it on a non-flammable surface outdoors and keep your distance. Don’t touch it with bare hands, don’t try to fight a growing fire yourself, and call the local emergency number (Rescue 1122 in Punjab) if a fire starts. Your safety is more important than the phone.
Can I replace it myself?
It is not recommended. Modern batteries are glued in, and removing them takes care, correct tools and controlled heat. Prying a swollen battery can puncture it. A technician has the experience and safety equipment to remove it. Our guide on essential technician tools lists the safe-handling basics.
What happens at the repair shop?
A technician will usually:
- Confirm the swelling and check for other damage, such as a stressed display or bent frame.
- Carefully remove the battery, using controlled methods.
- Fit a new battery that suits your model.
- Test charging, battery reading and the display before closing the phone.
- Handle the old battery separately as hazardous waste.
Because swelling can crack a display or bend the back, ask the technician to check them too. Rates and timing depend on your model; ask on WhatsApp 0345 7599995 and mention that the battery is swollen.
How should a swollen battery be disposed of?
Don’t put it in ordinary rubbish. Ask the repair shop to dispose of it with other used batteries, or keep it in a cool, dry, non-flammable container until it can be handed over to someone who can deal with it properly.
How to avoid it next time
- Use a quality charger and cable.
- Keep your phone cool.
- Replace a worn battery before it fails; see when to replace your phone battery.
- Don’t use damaged phones, power banks or cables. Our power bank safety guide applies the same rules.
- Choose a decent replacement battery, not the cheapest unbranded one.
Visit Junaid Telecom
If your phone has a swollen battery, message first so the team knows what to expect before you travel with it. Carry it carefully, switched off, and don’t keep it in a pocket.
Junaid Telecom & Repairing Lab, Madrasa Banat Road, Mohalla Garah, Dhol Sikandar, Chiniot. Open daily 8:00 AM to 9:00 PM.
- Repairing Lab WhatsApp: 0345 7599995
- Owner WhatsApp: 0345 7701965
- Staff WhatsApp: 0348 8651965