Definition: A swollen battery is a lithium-ion battery that has expanded because gas has built up inside its cells. In an iPad the battery sits directly behind the screen, so as it swells it pushes the display outwards. That shows up as bright patches, a screen edge lifting away from the frame, or glass that cracks without being dropped.
Why it matters for iPad repair
A swollen battery is a safety issue, not just a battery-life issue. A damaged lithium-ion cell can overheat. Swelling also damages other parts: the pressure can crack the screen, bend the frame or break the display’s internal layers. Replacing the battery early is far cheaper than replacing the battery and the screen together.
Signs your iPad battery is swelling
- Bright or “pressure” patches on the screen that don’t move with the picture.
- A gap or lifting edge between the glass and the aluminium frame.
- The iPad rocks when laid flat on a table, or the back bulges.
- Glass cracking from the edge without any drop.
What to do
- Stop charging it and don’t leave it plugged in overnight.
- Don’t press the screen back down or try to open the iPad yourself.
- Keep it out of hot places, such as a car or direct sun.
- Back up to iCloud if the iPad still works, then bring it in.
Why iPad batteries swell
Age and heat are the main causes. A battery that has gone through many charge cycles, or an iPad kept at 100% on a charger in a warm room for months, is the most likely to swell. Singapore’s heat speeds this up.
Related terms
- Battery Health – how much capacity a battery has left
- Battery Cycle – how batteries wear with use
- Laminated Display – the screen part most often damaged by swelling
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