The average that you can expect for a Honda Civic battery cost depends on the year and model of the car, as well as on the type of battery that you choose. For example, the average price for a 2010 Honda Civic EX replacement battery is around $100. The price can vary from $100 to nearly $200, depending upon the type of battery being purchased. Optima batteries, which carry only a 3-year warranty, may cost upwards of $179. Whereas a Duralast battery with a 7-year warranty, has an average price of $89 for the 2010 Honda Civic EX. It should be noted that the price does not include installation.