GoKawiilPopping trackpads signal swollen lithium-ion batteries in laptops, experts warn
Laptops with trackpads that bulge or pop out are often showing a symptom of a swollen lithium-ion battery, which sits directly beneath the trackpad in most designs including MacBooks and Surface devices. Battery swelling happens when overcharging or physical damage triggers chemical reactions that release gas, pushing outward against internal components. Apple has previously run replacement programs for MacBooks affected by this exact issue.