The Watt is the standard unit of measurement of electrical power or how much energy is released per second. It can be shortened to W.
In electronic devices, Watts is the product of the voltage across the device and the current flowing through it. One Watt is one ampere of current flowing at one volt.
The Watt is used to specify the rate at which electrical energy is dissipated, or the rate at which electromagnetic energy is radiated, absorbed, or dissipated.