Pthrilla2
CAGiversary!
If you happened to buy a Switch on or after July 17, 2019 you may be able to swap your old model for the newer model with the better battery. You need to ship your Switch to Nintendo and they will exchange it. You do have to pay to ship your old model to them.
https://www.polygon.com/2019/8/16/20809056/nintendo-switch-exchange-upgrade-new-battery-life
https://www.polygon.com/2019/8/16/20809056/nintendo-switch-exchange-upgrade-new-battery-life