The Kill-a-Watt October 13, 2013 by Liam Kill-a-watt plugged into computer uninterruptable power supply (UPS). These are photos of the device we got. This is the Kill-a-Watt device for measuring power usage of a appliance. This is the Kill-a-Watt plugged into the UPS. Rate this:please shareShareTwitterEmailLinkedInFacebookRedditPrintLike this:Like Loading... Related