The exact nature of the problem is left unmentioned, though battery expansion woes are nothing new for manufacturers companies relying on lithium-ion technology.
Just type in your computer's serial number to see if your MacBook Pro is eligible for a battery replacement.
Even though Apple stated that this program is not due to safety reason, affected units which were manufactured between October 2016 to October 2017 contain a component that could fail and caused their built-in battery to expend. The company does not say how many laptops are affected, and it is also offering refunds to anyone who has already paid for a battery replacement in a qualifying machine.
The problem only affects non-Touch Bar 13in MacBook Pros, and not all of them either. If in case your laptop is found affected you will need to take your MacBook Pro to either to a nearby Apple Repair Centre, or Apple Retail Store, or Apple Authorised Service Provider to get the unit repaired. It claims that it is not a safety issue, but that it will replace eligible batteries free of charge.
Apple, however, will not extend the standard warranty coverage of the devices.
The only fix is to replace the battery.
The programme will be available for five years since the original release of the "non-Touch Bar 13-inch MacBook Pro".
To find out serial number of your Macbook, close your device and turn it over.
Apple says that the servicing may take 3-5 working days. You will need to get in touch with Apple Support for that.