Is it safe to keep using a MacBook with a swollen battery?
The short answer
No. Stop using it. Shut the MacBook down, unplug it, and do not charge it again. A swollen cell is a lithium pouch that has built up gas, and it can vent or ignite under pressure or a knock. The swelling also pushes the trackpad up and can crack the display or the bottom case. Keep it on a hard surface, away from anything flammable, and get the battery replaced.
How to tell a MacBook battery is swollen
Start with the case. A swollen cell lifts the bottom cover, so the MacBook rocks on a flat desk instead of sitting still. The trackpad stops clicking properly or sits proud of the palm rest, the lid no longer closes flush, and on some models the keys near the centre rise. A battery health warning or shutdowns at odd charge levels can point the same way, but the bulge is what settles it.
What happens if you keep using it
A pouch swells because it is generating gas inside a sealed cell. That is a fault, not wear, and it does not settle down again. Charging adds heat and more gas. The second problem is mechanical, and it grows: the longer the swollen cell stays in, the more likely you are paying for a trackpad, a bottom case or a bonded display along with the battery.
Can a swollen MacBook battery be replaced at home?
Not by you. The cell is glued into the top case beside the trackpad, and levering a swollen pouch out is how it gets punctured. An engineer can do the swap at your address while the bulge is still clear of the trackpad and the display. Once it has lifted either one, iFixpert brings the machine to the Sector 49 bench, where the cell comes out under controlled conditions and a bonded display can be set flat again.
What to do until it is repaired
- Do not press the bulge, do not force the lid closed, and do not carry it in a bag.
- Take a backup while it still powers on.
- If the case gets hot, hisses or smells sweet, move away from it and open a window. That is a cell venting.
- Do not try to cool it in a fridge or with water.
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Last reviewed 2026-09-06