Sister in legislation misplaced controller and returned it after a 12 months, checked batteries and so they have been totally rusted and that is how the within appears; is it protected to make use of?

Slight rant inside the rationalization btw. Not fairly sister in legislation, the sister of my companion whom I plan to marry sometime. I lived with their household till just lately. For context her room is disgusting which is how I think about this occurred. She swore she left it in the lounge, time and again, but it surely was by no means there. She unoficially left about 10 months in the past and formally moved 5 months in the past, I let her borrow the controller a 12 months in the past. Her room was so disgusting and filthy we averted it (canine consistently pissed in there and was not taken care of so it was unsafe). This final week she was again on the town and located it in her room and used the excuse "somebody should have seen it in the lounge and put it again in my room" (everybody knew the black controller was mine and hers was the white, although). So I'm not shocked it obtained ruined however am offended. Any likelihood that is nonetheless protected to make use of or no?