The city of Covington continues to explore different billing options for its utility customers, and the council approved a pilot program Monday to test out pay-as-you-go electricity billing. The city will solicit 10 volunteer customers for the program, which will allow customers to prepay for electricity in the same way people buy cell phone minutes on an as-needed basis. Because they would prepaying for electricity, the customers would not have to pay a deposit when starting an account, which would particularly benefit customers with little or poor credit history that are charged deposits of