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{{WikipediaInfoAlt|Uninterruptible power supply}} ...e line-interactive UPS systems, only running their inverters when the grid power is unavailable. The 800, 1200, and 1500 models are known to have encountere ...

...source of electrical energy, although the two are often used in tandem to power components within a piece of equipment. ...C Magazine''.</ref> Ni-Cd batteries are still used in some uninterruptible power supplies and emergency lighting setups. ...