An auxiliary power supply (150) includes an auxiliary battery (152), power
supply circuitry (154), and a connector (108b). The power supply
circuitry (154) supplies an output which provides electrical energy for
powering the electrical circuitry (102) of a battery powered device (100)
and for recharging a battery (104) associated therewith. In one
embodiment, the power supply circuitry (154) supplies an output current
which is a function of the charge state of the auxiliary battery (152)
and a load current presented by the electrical circuitry (102).