* Uninterruptible power supply (UPS) units incorporate rechargeable batteries that store barely enough electrical energy to allow the user enough time, inside the occasion of a blackout or brownout, to appropriately save facts in memory and safely switch off the device. all courses and interfaces from the superclass hierarchy (e.g. https://cruzj8uv0.csublogs.com/40772882/not-known-details-about-uninterruptible-power-supply-definition