Unlike the house supply which comes in AC the other way of receiving Electricity is by DC.
In DC, the movement of electrons in a direction is constant. It does not fluctuate up & down. That is why it is called Direct Current or DC for short.
All battery types supply electricity in d form of DC.
By the way, most of your home electrical appliances use DC internally.
As we are gradually moving to less abstract part of electricity, please note that Electricity is all about the Control/Manipulation of the movement of electrons to achieve predetermined goals, whether it is to produce light, image, sound, heat, movement or whatever.
© Tunde Y. Salihu, 2016