A sensor module can include a battery housing comprising a battery cavity sized and shaped to receive a battery. The battery cavity can be defined at least in part by a wall to be disposed about at least a portion of a periphery of the battery. A package housing can be disposed on the wall of the battery housing, the package housing smaller than the battery housing. An integrated device package can be disposed in or coupled with the package cavity. The integrated device package can include one or more integrated device dies. An interfacing feature can be coupled with the battery housing and extending transverse to the wall. The interfacing feature can be configured to transduce a biological signature into a signal to be processed by the integrated device package. An interconnect assembly can electrically connect the interfacing feature to the integrated device package.
