I have an old MacBook that for various reasons has been sitting on a shelf in the closet for the last 1.5 years. I got it out today with the idea of cleaning it up and selling it. When I put it away, everything worked 100%, but now the battery seems to have died, the computer doesn't even see it. I tested the comp with a battery from another MacBook, it worked fine. Obviously, I can get more for the computer if the battery works, is there anyway to try to bring this one back to life?