Patent ID: 7295880

Claim:
An electrical stimulation system comprising: a first stimulation lead comprising an electrode; a second stimulation lead comprising an electrode; and an implantable stimulation pulse generator unit, wherein the electrode on the first stimulation lead and the electrode on the second stimulation lead are operatively coupled to the implantable pulse generator unit, the implantable pulse generator unit comprising; an electrical power supply; a stimulation unit coupled to the electrical power supply, wherein the stimulation unit is operable to provide electrical pulses to the electrode on the first stimulation lead and the electrode on the second stimulation lead; and a power monitor operatively coupled to the stimulation unit, wherein the power monitor is operable to measure a level of an electrical energy parameter for the electrical power supply and is operable to cause the stimulation unit to cycle the electrical pulses generated by the stimulation unit between the electrode on the first stimulation lead and the electrode on the stimulation lead when the level of the electrical energy parameter reaches a preselected threshold.