The total number of Sony rechargeable batteries subject to recall reached 7,659,000 units.
Literal
Recall-target [possessive-の] Sony-made rechargeable-batteries [topic-は] cumulative [at-で] 7,659,000 units [became-となった].
News reporting language. 回収対象 ('recall target') is a compound frequently seen in product-recall notices. 累計で ('cumulatively') marks the number as a running total. ~製 is the attributive suffix for 'made by X.' Japanese numerals use the 万 (ten-thousand) grouping: ７６５万 = 7,650,000; plus ９０００ → 7,659,000 total.