I did, and it works great. Here are the components I used:

- PSU : https://www.amazon.com/gp/product/B06XJVYDDW

- PSU mains power cord : https://www.amazon.com/gp/product/B07BQ8PY21

- DC power pigtail to connect Soundboks to PSU : https://www.amazon.com/gp/product/B08PYWN3T7

IMPORTANT: You can adjust the PSUs output voltage by 15%. Make sure to set the voltage to what the Soundboks is expecting from the Batteryboks (12.8V I think, but please verify before you plug in).