Willard Sandilands writes:
The cable that you need originally came with the UPS. GUARANTEED
(unless the UPS was not truly new and sealed, e.g. if it was "open box").

But, that said, APC is absolutely idiotic for not just using standard
USB sockets on their UPS'.

They seem to have changed. The one I'm using now does indeed have a
standard USB B jack on it. No special cable needed.

Dave