A:AnswerI hope I'm not too late but this is where you can purchase the battery
https://www.a-accessories.com/laptop/ux5406/ux5406sa/asus-ux5406sa-93296-103024.htm
A:AnswerSadly no. But I HIGHLY Recommend the laptop sleeves from tomtoc. They say that they’re for MacBooks but I did the measurements and ordered one and it fits perfectly.
A:AnswerIn the MyASUS application there are options to protect your display from OLED burning. It auto enables a function called “Pixel Shift” permanently to protect the display. Additionally you can enable an option called “Pixel refresh” that also prevents burnin.
A:AnswerAs of now, there is no official information indicating that the ASUS Zenbook S 14 (UX5406SA) will receive an update to Thunderbolt 5. The current model supports Thunderbolt 4, which offers high-speed data transfer and versatile connectivity.