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Does a UPS (APC) still consume electricity when it is turned off, but plugged into the wall?

I have a APC UPS that is used for my entertainment electronics (TV, DirecTV, PS3, etc.). Before I got the APC I just had a surge protector and just turned the surge protector switch off when I left home (to conserve electricity). If I turn off the UPS (after turning off the electronics), will it still use power even though it’s not plugged in?