https://wccftech.com/apple-officially-marks-the-first-macbook-pro-with-retina-display-as-obsolete/

Eight years after its release, Apple's first MacBook Pro with Retina Display is now "obsolete". According to Apple's support document, this means is that if you own a product that is obsolete, it is no longer eligible for any hardware services and there are "no exceptions" to the plan. Apple obsoletes products after years of support, more than what the industry provides which allows customers to be more loyal.

As mentioned earlier, Apple's first MacBook Pro with Retina Display is now obsolete and if you own it, Apple will not be accepting it for any repair, even if it requires a new battery. If you require any repairs, you will have to opt for an alternative. You can also make use of iFixit's DIY repair guides to fix your broken MacBook Pro.