Broken Car

I am temporarily without my car. About a week ago I felt like the battery was dying. I didn't drive it much this week but I went out yesterday to see how the battery was holding up. Well...I ran into bigger problems on my drive. I turned a corner and felt the power start to drain; an issue coming from the battery I thought. Just moments later I felt a new problem. Suddenly the car was picking up speed. Speed is not a problem, cars are meant to go with speed, the problem however was that I was not pressing down on the accelerator. I had to hit the brakes just to keep the car from smashing into the one in front of me. I put the car in neutral and the engine went crazy and almost exploded. So we shall see what is wrong with it in the next few days.