Pretty much every device uses electricity. Wouldn't it be great if we can figure out how much each of these devices cost per day, per hour, or even every time we use it? I tried finding out how much electricity it needs in Watts then try to figure out how much each KiloWatts or MegaWatts cost from the electricit bill and do some math there. It does take some work.
I saw at a Fry's Electronics a while back of a device that have an outlet to plug the Black Berry charger or TV or DVD player and it would be able to calculate the approximate cost of how much electricity the device use per hour. It is a Kill-A-Watts and cost about $25. There is also an advance version for about $60 from the same company. There are a few other bigger electricity meters that needs electricians to install.
If the meters can help us to lower our monthly energy bills, it would be a great investment. Would probably give one each to all my real estate buyers and sellers. Maybe finally we can find out if we should leave our computers on or off at night at home and at our office.