In a limited number of units an unnamed component may fail, causing the built-in battery to expand, according to a company announcement.
Visit this page to enter your MacBook Pro's serial number to find out if it's one of the affected units (which were manufactured between October 2016 and October 2017).
Apple also says that it will refund recent battery replacements for qualifying devices. "Affected units were manufactured between October 2016 and October 2017 and eligibility is determined by the product serial number".More news: Bungie Finally Reveals Details for Destiny 2: Expansion II - Warmind
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Unlike the tech giant's iPhone 6 or newer battery replacement program though, Apple says it will swap out MacBook Pro batteries for free. You can easily locate the serial number by navigating to About this Mac section after selection of the Apple logo in the menu located on the top side.
If Apple confirms that the battery needs to be replaced, it will be done, free of charge, at an Apple Authorized Service Provider, an Apple retail store. All you have to do is head to this page and enter your MacBook's serial number.
"This is not a safety issue", Cupertino promised, without providing any further information about the matter.
Battery replacements for laptops aren't a particularly new revelation. Those eligible can take the computer to an Apple Store or an authorized service provider, or mail the laptop to a fix centre.