What is important to know when ordering a replacement power supply? Volts and _______:

A.
hertz.

B.
watts.

C.
ampere hours.

D.
joules.

Explanation:
The watt (symbol: W) is the SI derived unit of power. The power (measured in Watts ) is the same
as the amount of Volts multiplied with the amount of Ampere delivered by the power supply.