Apparatus for charging a bioelectronic circuit that can be fed remotely, implanted in a patient or in a laboratory animal, said apparatus comprising: a) a composable container (10) configured to define a closed environment suitable for receiving a patient or an animal laboratory, said container (10) comprising at least a first winding (20, 21, 22) whose axis is arranged in a first direction (Z) and at least a second winding (30, 31, 32, 33) whose axis is arranged in a second direction (Y) perpendicular to said first direction (Z), said windings being configured so that they radiate an electromagnetic field when fed with alternating current, into said closed environment along said said first address (Z) and said second address (Y)； b) a system (40) for supplying energy to and exciting the windings of a composable container, said system (40) comprising a switching power excitation device (61, 62, 63, 64, 65, 66, 67) for each winding (20, 21, 22, 30, 31, 32, 33) and a programmable logic circuit (80), said programmable logic circuit (80) being configured to perform a phase comparison, while the circuit is connected of programmable logic (80) to a microprocessor (50) of the power supply and excitation system (40), said microprocessor being configured to provide excitation signals to the windings (20, 21, 22, 30, 31, 32, 33) to generate inside the container (10) a rotating magnetic field, characterized in that the container (10) comprises a series of composable walls made of a non-magnetic material, said walls forming said closed environment, said windings being installed in the walls, or on them, and configured in such a way that they are not accessible to the patient and / or to the laboratory animal confined in the container (10) and have electrical terminals accessible only from the outside of the container (10) when mounted, and because the Power supply and excitation system (40) further comprises a series of phase-locking ring circuits (71, 72, 73, 74, 75, 76, 77) r
