?? ????? ??????? ????? ?? ????/????/????? ??? ?????/?????/??????/?????? ????? ???. ???? ??????? ?? ????? ?? ????/????/???? ??? ???????/????? ???????/ Backup power ??????? ?? ??? ??/???/???/ ???? ????? ???????/???????/??????? ??? ?? ???? ???/??????/???? ?? ???? ????. ?? ????? ??????? ???? ???