If you own a new MacBook Pro then you can check if it's eligible for a replacement battery by visiting Apple's website and entering the product serial number. The exact nature of the problem is left unmentioned, though battery expansion woes are nothing new for manufacturers companies relying on lithium-ion technology. Expanding batteries have in the past been linked to fires, but it seems that isn't the case here.
If this MacBook does launch it could follow a trend of cheaper devices arriving from Apple.
The only fix is to replace the battery.
Apple says that this service does not extend the warranty on any of the MacBook Pro units affected.
However, making it clear that this is no safety issue, Apple said, "the flaw that has been reported in some 13-inch MacBook Pros without Touch Bars, is not a safety issue".
Apple took to Apple support page to post details about the eligibility criteria for the replacement program.
Apple warns that the machine will be examined prior to any service to verify it is eligible for the program and in working order.
Replacing the battery could take between three to five business days, Apple has warned, and may require the device to be shipped to an Apple Repair Centre. This issue was addressed by Apple on its support page, however, the company did not give the exact figures of the pieces that are affected due to this problem.