Buy for Rechargeable Battery
The Xbox Elite 2 controller features a built-in rechargeable battery that is rated for 40 hours on a charge.
This is a major upgrade from the original that ran on AA batteries and it's a huge upside for gamers that like to grab and start playing without worrying about looking for AA batteries at 10 PM when they finally have time to play.
40 hours is a great amount of time, so you can essentially forget about the limitation and then charge it when you have time. You can also charge with USB C instead of Micro-USB.