What Causes iPhone Battery Swelling — And What to Do About It
- KiR
- 2 days ago
- 2 min read
If your iPhone screen is lifting, the back of your phone feels soft, or your case doesn’t fit anymore — you might be dealing with a swollen battery.
In this post, we explain what causes iPhone battery swelling, how to spot it, and why it’s important to get it sorted quickly.
What is battery swelling?
Battery swelling happens when gas builds up inside the battery due to chemical breakdown. It causes the battery to expand — sometimes slowly, sometimes suddenly — and push against the inside of your phone.
In iPhones, this often results in:
The screen separating from the frame
A visible bulge in the case
The phone no longer sitting flat on a surface
What causes iPhone battery swelling?
Overcharging or leaving your phone plugged in constantly
Battery ageing — most iPhone batteries degrade after 2–3 years
Extreme heat or direct sun exposure
Internal faults from drops, water damage, or faulty charging
Using poor-quality charging cables or plugs
It’s not always your fault — batteries wear down over time. But ignoring the signs can lead to more serious problems.
Is it dangerous?
Yes. A swollen battery is not just an inconvenience — it’s a safety hazard.
It can:
Crack your screen from the inside
Damage internal components
In rare cases, leak or catch fire if punctured
If you notice swelling, stop using the phone, don’t press the screen back down, and definitely don’t try to charge it.
Can it be fixed?
Yes — the swollen battery can be replaced safely by a trained technician. At Kent iPhone Repair, we:
Replace swollen batteries on-site
Use high-quality, safe battery cells
Check for additional damage
Come to you — so you don’t have to risk transporting the phone
Repairs typically take 20–30 minutes. You’ll get your phone back in safe, working condition — no fix, no fee.
We cover your area
We carry out mobile battery replacements in:
And nearby towns across Kent
Contact us today if you’ve spotted any signs of swelling — we’ll take a look and let you know what’s needed, no pressure.
Swollen battery? Don’t wait. It’s fast, safe and affordable to fix — and we’ll come to you.