battery vs mains

Mains use

Alternating current (A.C)

Batteries use

Direct current (D.C)

Alternating current vs direct current

A.C changes directions, D.C does not

Electricity is a

Flow of current

Mains voltage

230 v

Mains frequency

50 hertz

Frequency

How many times it changes direction in a second

Pros and cons of D.C

Pro, devices like laptops run more smoothly and won’t be constantly restarting. Con, loses more electricity through friction

Pros and cons of A.C

Con, constant start stop would be noticeable for small devices. Pro, more energy efficient.

When things like laptops are plugged in, the electricity

Comes from an a.c source into a d.c battery, so the laptop is not constantly restarting but has access to more electricity