The invention relates to a method for fabricating an electronic device comprising an electronic/electrical circuit, wherein it comprises the following steps: formation of a support-body comprising a battery inside; making of a cavity emerging on the surface of the support-body, said cavity revealing connection terminals of the battery; connection of an electronic/electrical circuit to the battery via the terminals situated in said cavity; exchanging of data in the electronic/electrical circuit by electrical contact. The invention also relates to the corresponding electronic device.