Patent ID: 7175677

Claim:
A method of assembling a battery unit, comprising the steps of: reflow soldering a positive battery terminal and a negative battery terminal onto a printed circuit board; coupling an upper housing to the battery; coupling the printed circuit board to a lower housing; coupling the lower housing to the upper housing such that the battery contacts the positive battery terminal and negative battery terminal, and positioning the positive battery terminal and the negative battery terminal on the printed circuit board prior to soldering such that after the second coupling step is carried out, the third coupling step can be carried out by moving the lower housing along a single axis of translational motion toward the upper housing, wherein the upper housing includes a housing wall, wherein the step of coupling the upper housing to the battery includes positioning an edge of the battery a spaced distance from the housing wall, wherein the step of positioning the positive battery terminal and the negative battery terminal prior to soldering includes positioning the positive battery terminal translationally on the circuit board such that, when the third coupling step is carried out, the positive battery terminal engages the housing wall and an edge of the battery on opposite surfaces.