For some non-UPS but related use cases... I don't think it's uninterrupted, but I use this Anker PowerCore Fusion III as my main wallwart USB-C fast-charger, with the bonus that it also keeps its own internal 5 Ah battery charged: https://www.amazon.com/gp/product/B085CFD3Z9/ Current model might be: https://www.amazon.com/dp/B01K702S66/