US Patent 11996701 Hearing device and circuit board for a hearing device

A hearing device has a battery module. The battery module has a secondary cell and a reception coil for contactless charging of the secondary cell. The battery module has a circuit board with a conductor track which forms the reception coil. The circuit board contains a plurality of layers. The conductor track extends over the plurality of layers while containing a conductor loop, which has at least one turn, in each of the plurality of layer. A corresponding circuit board is furthermore specified.