Corded power tools are generally more powerful and you don't have to re-charge all the time.
They generally have more power and don't go dead when you need them.
Battery operated tools are also electric, but I think you mean corded and cordless. Corded can be more powerful and will run "forever", but you have to drag the cord around. Cordless are easier to move around with, but have to be recharged regularly.
The battery help to get something which is electric to get the power.
I love using battery operated drills but I never run out of power when I use corded drills-- I don't have to charge one and use one and I don't have to spend $70 for each battery, and I don't have to worry about spending $45 more for battery chargers when workers crush my charger. However: I must say Cordless Drills also Rock if you hate to be swinging cords over your shoulder all the time.
Battery
battery
* Electric Power * battery
a battery in an electric circuit is used to generate the power supply.
Yes, a battery is an electrical storage device.
A voltaic cell (battery) will do that.
Battery powered cars use a small battery to power an electric motor to drive the wheels.
Electric power for any of the electric cars out there comes from normal household power sources. This is stored in a battery until the toy is ready to be played with.