a frameless battery cavity formed in a device enclosure retains a battery housing . cantilever tabs on a battery end of a wall of the device housing have detents that forcibly engage the battery housing when the battery housing is fully inserted into the battery cavity . the detents are restrained from springing away from the battery housing when it is fully inserted by notches in a battery cover . the notches engage the detents after the battery has been fully inserted . the battery cover is secured in the opening to the battery cavity so that the detents are prevented from expanding away from the battery , and thus releasing the battery from the cavity , unless the cover is removed by a user . a guiding mechanism guides the battery housing into the cavity to facilitate electrical engagement of a connection between the battery housing and the device housing .