You can use the mUPS with any single 12V battery (AGM, Gel, Lead Acid, regular car batteries, deep cycle marine batteries, etc.). - стало грустно. Литиевы из моды вышли?
каким образом, оценочным? "In RouterOS it is possible to detect when running on battery power by monitoring the input voltage with scripting, since the voltage will change without a RouterOS reboot."