An infusion pump (10) is configured to be powered by either a disposable
battery source or a rechargeable battery source. The infusion pump (10)
has a housing (12) having a recess (33). A motor is positioned within
the housing (12) and is operably connected to an electrical contact (94)
disposed in the recess (33). The motor powers the pump (10). The
recess (33) receives one of a rechargeable battery unit (90) having
an electrical contact (98) that contacts the recess electrical contact (94),
and a disposable battery unit (92) having an electrical contact (144)
that contacts the recess electrical contact (94).