The 62nd Field Battery, in conjunction with the 44th Field Battery, RCA, mobilized the 44th/62nd Field Battery, RCA, CASF, for active service on 24 May 1940. This unit was reorganized as two separate batteries on 1 January 1941, designated the 44th Field Battery, RCA, CASF, and the 62nd Field Battery, RCA, CASF. It was redesignated the 62nd Light Anti-Aircraft Battery, RCA, CASF, the same day. The battery provided light anti-aircraft artillery support as part of the 11th Light Anti-Aircraft Regiment, RCA, CASF, 1st Canadian Anti-Aircraft Brigade in Great Britain. The overseas battery was disbanded on 1 March 1944.