Battery powered equipment generate very short square, triangle or exponential pulses. In addition they are unable to generate the necessary high energy, electromagnetic fields simultaneously at each individual coil, otherwise, the battery would be exhausted in a very short time.
The Curatron generates a pure sinusoidal waveform which has been proven to be the most effective.
These battery powered systems simply do not induce sufficient energy transfer into the body in order to obtain any realistic electron movement. The minuscule amounts of generated energy will not create any relevant or beneficial piezoelectric effect inside cells.