Hey MutDiz ,
Good news for you in April 2018 Apple is offering free battery replacements to customers with eligible hardware.
The program covers affected MacBook Pro models for five years after initial retail sale, suggesting the program will run into 2022. Apple says hardware warranties remain unaffected by the policy update.
Users who believe their 13-inch MacBook Pro suffers from the described swelling issue can check eligibility by plugging in their device serial number on Apple's dedicated replacement webpage. This information can be found by navigating to Apple (logo) > About This Mac or on the underside of the computer near its regulatory markings.
Eligible MacBook Pro units can be taken to an Apple Authorized Service Provider or Apple retail store for replacement services. Alternatively, customers can mail their device to the Apple Repair Center. Those who have already paid for a battery replacement, and believe their machine falls within Apple's eligibility guidelines, are urged to contact customer service for reimbursement.
Cheers.