Mouse doesn't turn on after a horrible battery leak.

I have a Mighty Mouse. It suffered from a battery leak when it was in the hands of somebody else. I took it and tried to connect it to my Mac, it kept disconnecting and showed the battery percentage of the mouse wrong. Recently I tried to connect it my iPad and it worked.. but I spoke too soon, and the mouse again stopped working after a week. I opened it and saw there was not much a battery acid damage out there. I tried cleaning the negative contact points but it didn't work. I would like my mouse to be working again.

I saw that one of the screws has been totally covered in acid.