Question: Among the incidents with the generic description of "BATTERY" in the IUCR classification, how many of them do not have arrests made?
SQL: SELECT SUM(CASE WHEN T2.arrest = 'FALSE' THEN 1 ELSE 0 END) FROM IUCR AS T1 INNER JOIN Crime AS T2 ON T1.iucr_no = T2.iucr_no WHERE T1.primary_description = 'BATTERY'