Moved to Forum: Original Link
Posting this based on the prior iPhone Battery Replacement post and as a matter of safety. Apple say it isn't a "safety issue" but expanding battery seems concerning eitherway.
Just announced:
Apple has determined that, in a limited number of 13-inch MacBook Pro (non Touch Bar) units, a component may fail causing the built-in battery to expand. This is not a safety issue and Apple will replace eligible batteries, free of charge. Affected units were manufactured between October 2016 and October 2017 and eligibility is determined by the product serial number.
Gotta love Apple's free of charge replacement.