A small daemon for Fortron FSP EP 650 uninterruptible power supply. It monitors a UPS connected via USB and presents realtime info including battery life via a HTTP server at http://127.0.0.1:2857. It can also shutdown the host after some time.
Tested on Linux. No technical support of any sort. I am using it on my home mini server, maybe it will be useful for you too. Distributed 'as-is'.