Swollen MacBook battery: what to do now

What to do immediately

1. Stop using and charging the Mac. If it is safe to operate the controls, shut down normally and disconnect the power adapter.
2. Avoid pressure. Don't push the case, keyboard, trackpad or lid back into position.
3. Leave it undisturbed in a safe location away from heat and combustible material, without handling a hot, leaking or smoking device.
4. Contact Apple or an Apple Authorized Service Provider. Describe suspected swelling before taking or sending it anywhere.

Apple's safety guide says not to use a damaged Mac and to disconnect power when service or repair is suspected. Its battery-repair safety material warns against puncturing, striking or crushing the battery or device.

If it is smoking, sparking, rapidly expanding, or making hissing or popping sounds, move away and contact local fire authorities. Don't handle it to complete a software check. Apple's detailed thermal-event procedure is written for prepared repair workspaces; this article doesn't turn an ordinary desk into one.

Physical changes that deserve assessment

A new bulge, separating enclosure, lifted trackpad or keyboard, or a Mac that no longer sits flat needs a physical inspection. These are warning signs to report, not a remote diagnosis that the battery is definitely responsible.

Apple's mechanical troubleshooting guidance notes that wobbling or an uneven case can have other causes, including damaged or displaced parts. A service provider needs to distinguish those possibilities. Don't open the case yourself merely to prove which one applies.

Take note of visible changes without pressing, flexing or repeatedly opening and closing the Mac. If a photograph can be taken without moving or handling the device, it may help explain the issue to service. No damaged battery was handled or tested for this guide.

Normal health does not prove the battery is physically safe

Maximum Capacity describes estimated capacity compared with new. Cycle count describes cumulative charge use. Neither is a sensor for the physical shape of a battery cell.

A battery can require an assessment because of physical damage regardless of whether software reports Normal, a high capacity percentage or few cycles. Don't keep using the Mac to collect a better-looking reading.

The reverse matters too: Service Recommended isn't a synonym for swelling. Apple says that status can reflect reduced capacity or abnormal operation. Its general advice that the Mac can continue to be used with that status is not permission to use a visibly damaged device. See the status guide for a battery without signs of physical damage.

Do not try to flatten, drain or repair it with software

Don't puncture a cell, squeeze the enclosure, clamp the lid, apply heat, freeze the Mac or try to release gas. Don't remove screws to make more room for an expanding battery. Physical manipulation can add damage.

Don't run a benchmark or video loop to empty it before service. Apple's battery manual includes controlled discharge preparation for qualified repair work; that isn't a home troubleshooting instruction for a suspect damaged pack.

An SMC reset, a charge limit or a calibration ritual cannot undo swelling. A cooling pad isn't a repair either. Changing a displayed percentage or temperature does not restore the physical condition of a cell.

Arrange service before transport

Tell Apple or the provider the exact model, the visible symptoms and whether there is unusual heat, odor, leakage or rapid change. Ask how the device should be brought in, packaged or handled. Follow their instructions for the specific condition.

Don't put a damaged battery in household waste. Apple says the built-in battery must be recycled separately and handled under local environmental rules. Use its service and recycling route for the appropriate disposal arrangement.

Do not improvise shipping or assume a normal laptop parcel is suitable. Let the provider explain the accepted transport method for a damaged device. If there is an immediate thermal event, the priority remains moving away and getting fire assistance.

Data and repair cost

If the Mac is already shut down with suspected swelling, don't restart it just to make a new backup. Tell the provider which files matter and use existing backups or cloud copies from another device if available.

Service can affect data. Ask about recovery and backup options before approving a repair that may erase or replace storage. A safety concern changes the normal “back up first” order: it isn't a reason to keep running a damaged machine.

Cost depends on the exact model, inspection, coverage and region. The replacement-cost guide explains Apple's dated US estimates and their limits; an estimate does not confirm the necessary repair or its coverage.

Tend's limit here

Tend shows battery health and cycles for free, which can provide background information on a normally operating Mac. No app, including Tend, can detect or rule out swelling from those readings. Do not install, launch or keep it running to decide whether a deformed battery is safe.

Questions

Related guides

Sources

Sources checked 23 October 2026. These are documented steps and specifications; no repair, installation or performance test was run for this guide.

• Apple, Mac safety, damaged devices and service
• Apple, Mac Battery Safety, 30 April 2026
• Apple, Mechanical issues and physical inspection limits
• Apple, Meaning of Service Recommended
• Apple, Mac laptop service
• Apple, Battery service and recycling

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