Information about the proper replacement battery size for a Honda Accord is available on Hondaﾒs eStore website. The information also is available on Walmart's battery-finder application on battfinder.com. The car's user manual also typically indicates the proper replacement battery size.
To find the appropriate size battery using the Honda eStore, enter the model year of the Accord in question and the word "battery" into the search field. The site returns a list of available batteries and battery parts for that car. Walmart's battery finder works similarly. Simply enter the make, model, year and engine size of the car in question and the site shows an EverStart battery that is the correct size for the car.