> For the complete documentation index, see [llms.txt](https://docs.moamocap.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.moamocap.com/vive-ultimate-tracker/checking-the-status-using-the-hardware/when-the-ut-led-is-red.md).

# When the UT LED Is Red

A red LED indicates that the battery level is low.

The battery level can also be checked in the MoA interface.