The 2013-2016 era Retina batteries are replaceable from independent repair shops (i.e. not affiliated with Apple.)
The batteries are glued in, but independent repair folks found a way to remove them with some isopropyl alcohol and old credit cards/gift cards or sturdy playing cards.
This isn’t for the faint of heart, as they can explode, but repair shops have experience replacing them.
Would be awesome if I can find some decent repair shop that can make it like new but unfortunately I had a bad experience with my previous macbook pro 2011. It was battery first, than some power controller. As they said apple stops making repair parts after few years and you can find change only in used laptops.
Apple replaced my screen free of charge for the anti-glare coverage issue. I believe the program officially expired, but you can definitely go and ask.
Apple also replaced the battery for a very modest cost (99 I believe) since it was already having the screen repaired. My late-2014 laptop soldiers on. I'll probably cave and buy the next MacBook Pro though.
I bought a 2013 mbp (maxed 13 inch) last year. It just had a battery and screen replacement. I think it will last me at least 5 years. At least I hope it will because it is so much better than the new mbps which I had my money ready for initially.
The batteries are glued in, but independent repair folks found a way to remove them with some isopropyl alcohol and old credit cards/gift cards or sturdy playing cards.
This isn’t for the faint of heart, as they can explode, but repair shops have experience replacing them.