The battery operated Electronic Voting Machine (EVM) has more advantages than the ballot box. They are as follows :
It saves tonnes of paper used to make ballot paper.
So, it conserves the environment as it stops the reckless cutting of trees required to make paper.
If the voter does not wish to cast his vote in favour of any candidate contesting, he can make use of NOTA (None Of The Above).
It makes counting of the votes much faster which enables the election officer to declare result in a short time.
It is helpful for disabled (Divyanga) people to cast vote.