Sony has cut its annual profit forecast by 10% due to one-off costs from the sale of its battery business.
The Japanese electronics giant will sell the unit to Murata Manufacturing and said it expected to book impairment charges of 33bn yen linked to the sale.
The firm now expects operating profits of 270bn yen ($2.6bn; £2.1bn) for the year ending March, 30bn yen lower than its previous forecast.
Sony is scheduled to release its first-half results on Tuesday.
The announcement was made after markets had closed in Tokyo. During the trading session its shares had closed 1.9% higher.