Among the incidents with the generic description of "BATTERY" in the IUCR classification, how many of them do not have arrests made?
general description refers to primary_description; 'BATTERY' is the primary_description; do not have arrest made refers to arrest = 'FALSE'
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'