Possible Uninterruptible power supply for Pine64's SBC's

[Arwen]

I have a 12v, 18 watt model for my fitlet miniature PC / server. It does not have remote monitoring, nor would it likely have enough power for a 3.5" disk in addition to a miniature PC / server. But, it does the job for me perfectly, and has done so for more than 4 years. Here is a link;
fit-Uptime UPS


Ideally, a small, smart UPS would have a USB 2.0 port for monitoring. Plus, some pass through USB 2.0 ports, (aka hub ports), that would be powered from the UPS at all times. (Meaning they don't take host power.) This would allow people to charge their smart phones and potentially a tablet during a power outage, if the UPS had extra juice.

One note about power loss detection. Even though my little "fit-Update" UPS does not supply any monitoring, my server can "ping" test something that is not protected by UPS. Thus, detect A.C. power loss and in theory, if A.C. power does not return within a pre-determed time frame, the server could shut it's self down.