The cost of replacing a MacBook pro battery ranges from $60 to $200. It depends on the service center, condition of the battery, warranty, and also on the MacBook model you have. Except for these types of replacement, there is another crucial thing that changes the cost and it is the MacBook Pro model.
A battery replacement service ($199) simply replaces the top case/battery together for a battery replacement cost. I don't know how it's handled when someone comes in with a Retina MBP for a battery service, where it might have a keyboard issue. At this point they probably have a record of you bringing it in for a keyboard issue.
In this video, we show you how to Upgrade or Replace the Battery in a 15-Inch MacBook Pro (mid 2018 - 2019).Works with the following MacBook Pro models with
published 24 June 2019. Apple has issued a voluntary recall for a select group of 15-inch MacBook Pro units due to potential issues with the battery overheating. To know if this issue affects your MacBook Pro, you'll need to get its serial number. If your MacBook Pro is one of those affected, it will be eligible for a battery replacement. Replacing the battery and other related components will cost more than $500. I don't think I should pay for the replacement. 15-inch MacBook Pro Battery Recall