A swollen laptop battery can push the trackpad upward, creating a fire hazard that requires immediate attention. Lithium-ion batteries produce harmful gases when overcharged or physically damaged, causing them to expand and press against internal components. Since the battery typically sits beneath the trackpad, a popping or loose trackpad often signals battery failure.

Apple has previously issued replacement programs for MacBooks with this exact issue. Continuing to use a device with a swollen battery risks explosion or combustion. If the trackpad lifts or the laptop case bulges, power down the laptop immediately and unplug it.

For safety, seek professional repair rather than attempting DIY fixes, as puncturing a swollen battery can trigger fire. Most laptop manufacturers offer free battery replacement under warranty. To prevent future issues, avoid exposing devices to extreme temperatures, use certified chargers, and store laptops at 50% charge when not in use for extended periods.