this invention includes a latch member for a latch assembly , suitable for a removable battery package . the latch member accommodates attachment to a latch coupler of an electronic device . a resilient , springy - metal , deflectable latch member is provided . the latch member includes arms for coupling with a latch coupler , a locking arm for adhering to a plastic housing , and spring arms that cause a torsion element to twist when force is applied to the arms . the torsion element is at least twice as long as it is wide , and provides reliable return force despite a short travel length of the arms . the latch member is suitable for battery packages in which space is a premium .