Thank you for supporting our product. 

No, Nebula X1 Pro does not feature a built-in battery and requires a power source to operate. 

As Nebula X1 Pro is positioned as a high-performance projector, it demands stable power to support features like 4K resolution and intelligent image processing algorithms, which are power-intensive. An internal battery would increase the device's size and heat dissipation load, potentially compromising performance stability, while also limiting efforts to reduce its weight. Anker SOLIX C800 and C1000 can charge Nebula X1 Pro.

If you have any other questions, please don't hesitate to contact Nebula Customer Support at service@soundcore.com  for further assistance.