Oh, and just in case anyone in here hasn't read the instruction sheets that come with UPSs :-), NEVER plug a laser printer or TV or anything that draws a lot of power at once into a UPS. It's likely to kill your battery permanatly if you leave it on there too long.
Also, some devices don't react well to the sawtooth wave output of a UPS. Most electronics are fine, as is anything that uses an AC-DC power brick. Things that run motors off straight AC are the most likely to be affected.
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