Best Answer: If you still have a Quest 2 warranty and your battery fails, you can contact Meta Support to send you a shipping label so they can fix the problem for you — but they'll have to approve the need for repair.
You can disassemble the Quest 2 yourself or find a third-party option, but its design is extremely unfriendly to DIY repair and you could easily break the device. A better option is to bypass the internal battery and rely on an external battery strap instead, most of which can surpass the Oculus Quest 2's original 2.5- to 3-hour battery life.