Batteries create energy out of nothing. Magnetic field lines start at one pole and end at the other. Poles can be isolated. Flux is the same as field lines. Flux is actually the flow of the magnetic field.
Magnetic fields are the same as electric fields.
Charges at rest can experience magnetic forces. Magnetic fields from magnets are not caused by moving charges. Magnetic fields are not 3-dimensional. Magnetic field lines hold you on the Earth. Charges, when released, will move toward the poles of a magnet.