Battery Chamberlin is an artillery battery in the Presidio of San Francisco, San Francisco, California, United States. The battery is named in honor of Captain Lowell A. Chamberlin, who had served with distinction in the Civil War. It was added to the National Register of Historic Places on November 7, 1976. Operation of the gun is open to the public, usually on the first full weekend of each month from 11am to 3pm. An underground magazine contains photos and small exhibits on the harbor defenses of San Francisco. The battery is located at the north end of the parking lot at Baker Beach.