More details on the vehicle:
The right front CV boot leaked for a while but I had the entire axle replaced in early 2011. The loud wheel bearing issue did come up around 50k miles or so but I had that warranty fixed at a dealership.
In my original post, the "wire on the battery" that needs replacing is the the topmost wire on the positive battery terminal. It has been overused and twisted and so it's breaking right behind the positive terminal. It definitely needs to be replaced.