Central Park is 46 times larger than Battery Park.
Area: 0 km2 calculated
Battery Park is a 25-acre public park located at the Battery, the southern tip of Manhattan Island in New York City, facing New York Harbor. The Battery is named for the artillery batteries that were positioned there in the city's early years to protect the settlement behind them. Wikipedia
Area: 3 km2 calculated
Central Park is an urban park in the New York City borough of Manhattan. It was initially opened in 1857, on 778 acres of city-owned land. In 1858, Frederick Law Olmsted and Calvert Vaux won a design competition to improve and expand the park with a plan they titled the Greensward Plan. Wikipedia