[My recent question about an APC UPS][1] was closed as off-topic ("This question is not about computer hardware or software, within the scope defined in the help center.") I flagged another [UPS-related question][2] as off-topic since it was a very similar to mine. The flag was declined. How can I decide which UPS-related questions are on-topic here?

If I'm right both questions could belong to the...

> electronic devices, media players, cell phones or smart phones, except insofar as they interface with your computer,

...off-topic reason.

[1]: https://superuser.com/questions/1375975/disabling-repeating-battery-failure-alarms-on-an-apc-smart-ups
[2]: https://superuser.com/questions/937314/apc-smart-ups-x-1500va-warning-state-connect-battery