Automated teller machines (ATMs) are electronic devices employed to withdraw funds automatically without the need to complete withdrawal documentations. ATM works through an electronic system where an account holder is assigned specific code and identity that ensures access to the account for withdrawal by the account holder. One of the advantages of ATM is that it can be installed at any location outside the bank office, especially in super markets and other public places, ensuring withdrawal of funds at any time for immediate use without recourse to the bank that holds the accounts. In such environment, security of the machines is important so also is constant supply of electricity to power the machines.