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https://technology.mb.com.ph/2018/04/21/apple-offers-battery-replacement-for-some-macbooks-after-flaws-reported/Apple said the flaw, reported in some 13-inch Macbook Pros without touch bars, is not a safety issue.The affected units were manufactured between October 2016 and October 2017, Apple said on its support page, without giving the actual number of MacBooks affected.