On May 27, 2015, about 1405 central daylight time, a Bellanca 8KCAB airplane, N102EC, experienced a loss of control authority and impacted terrain during a forced landing near the Richard I Bong Airport (SUW), Superior, Wisconsin. The commercial pilot and passenger were not injured. The airplane sustained substantial damage. The airplane was registered to and operated by a private individual under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed for the flight, which operated without a flight plan.According to the pilot, the flight was normal until after the second touch and go landing. The airplane was in a climb from the runway when it began an uncommanded left bank. He perceived that the ailerons were jammed and attempted to regain control of the airplane but was not successful. Additionally the pilot could not get the airplane to climb, so when the airplane was about 100 feet above ground level he performed a forced landing to the airport property. The airplane's forward fuselage was substantially damaged during the forced landing. A postaccident examination of the airplane by a Federal Aviation Administration inspector found a 9-volt battery jammed in the lower right aileron bellcrank. The pilot reported that the battery was the same brand that the he used for his headset. He had previously changed the batteries in flight several days earlier, but thought that he had accounted for all of the batteries.