Laptops and UPS circuits

25 pts.
Tags:
battery
Laptops
UPS circuits
A laptop basically has a built in UPS system where AC electrical power is converted to DC and the battery would also serve as backup in event of power failure. I've always heard that a UPS should avoid being plugged into a UPS circuit. So plugging a laptop into a UPS supplied circuit, should this be avoided?
ASKED: June 6, 2013  2:00 AM

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  • TomLiotta
    There was a time when equipment such as surge suppressors and UPSs could result in a kind of feedback being generated along the power circuit if multiples of them were connected in series. (Some early IBM PS/2s had internal surge suppressors. The User Guide had a warning that plugging the PS/2 into a surge suppressor could void its warranty. I'm not aware of any consumer problems with them, but IBM apparently thought it was possible with at least some of the types of suppressors.) . AFAIK, practically all such problems have been engineered out for general consumer equipment. For major UPSs,it's a good idea to read the manuals carefully; but there's little reason to run them in series. . Tom
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  • ironcore
    Hi Tom, thanks for your response. I have several hundred work stations, all with UPS supported circuits originally setup for desktop PC hardware. Now, everyone typically using laptops and are plugging them into the UPS receptacles instead of non-UPS receptacles. My concern was possible interaction between the UPS feeding two to three hundred laptops. So far no problems, but wanted to field the question. phil
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