Dispenser energy on refill unit

1. A dispenser for dispensing a material, comprising:

a circuit in communication with a battery and a rechargeable energy storage device, the circuit placing the battery and the rechargeable energy storage device in series during a dispense event such that an actuator that facilitates dispensing the material during the dispense event receives power from the battery and the rechargeable energy storage device during the dispense event,

wherein the circuit places the battery and the rechargeable energy storage device in parallel in the absence of the dispense event such that the battery recharges the rechargeable energy storage device.

2. The dispenser of claim 1 , wherein the battery recharges the rechargeable energy storage device to less than about 75% of a rated capacity of the rechargeable energy storage device.

3. The dispenser of claim 1 , wherein the battery recharges the rechargeable energy storage device to less than about 50% of a rated capacity of the rechargeable energy storage device.

4. The dispenser of claim 1 , comprising:

a pump in communication with the material, wherein the actuator is in communication with the pump to actuate the pump to dispense the material during the dispense event.

5. The dispenser of claim 1 , wherein the rechargeable energy storage device comprises a capacitor.

6. The dispenser of claim 1 , wherein the rechargeable energy storage device comprises a rechargeable battery.

7. The dispenser of claim 1 , wherein the rechargeable energy storage device comprises a plurality of capacitors.

8. The dispenser of claim 7 , wherein during the dispense event, the rechargeable energy storage device provides a voltage to the actuator that is equal to the added voltages of each of the plurality of capacitors and the battery.

9. The dispenser of claim 1 , wherein a voltage rating of the actuator is greater than a voltage of the battery.

10. The dispenser of claim 1 , wherein the circuit comprises a transistor and a charge pump configured to provide a voltage to the transistor to change a state of the transistor, thereby causing the battery to be placed in series with the rechargeable energy storage device.

11. A dispenser for dispensing a material, comprising:

a pump in communication with the material;

an actuator in communication with the pump to actuate the pump to dispense the material during a dispense event; and

a circuit in communication with a battery and a rechargeable energy storage device, the circuit placing the battery and the rechargeable energy storage device in electrical communication with the actuator during the dispense event such that the actuator receives power from the battery and the rechargeable energy storage device during the dispense event,

wherein the circuit places the battery and the rechargeable energy storage device in parallel in the absence of the dispense event such that the battery recharges the rechargeable energy storage device.

12. The dispenser of claim 11 , comprising:

a refill unit containing the material, wherein the pump is in communication with the refill unit.

13. The dispenser of claim 12 , wherein the battery is on the refill unit.

14. The dispenser of claim 13 , comprising:

a housing, wherein at least one of the pump, the actuator, the circuit, or the rechargeable energy storage device is on the housing and the refill unit is selectively attachable to the housing.

15. The dispenser of claim 14 , wherein the rechargeable energy storage device is on the housing.

16. The dispenser of claim 11 , wherein the rechargeable energy storage device comprises a plurality of capacitors.

17. The dispenser of claim 16 , wherein during the dispense event, the rechargeable energy storage device provides a voltage to the actuator that is equal to the added voltages of each of the plurality of capacitors and the battery.

18. The dispenser of claim 11 , wherein the circuit places the battery and the rechargeable energy storage device in series during the dispense event.

19. The dispenser of claim 11 , wherein the battery has a voltage of less than about 3 volts.

20. The dispenser of claim 11 , wherein the rechargeable energy storage device is a supercapacitor.

21. A method of operating a dispenser for dispensing a material, comprising:

placing a battery and a rechargeable energy storage device of the dispenser in series during a dispense event such that an actuator that facilitates dispensing the material during the dispense event receives power from the battery and the rechargeable energy storage device during the dispense event; and

placing the battery and the rechargeable energy storage device in parallel in the absence of the dispense event such that the battery recharges the rechargeable energy storage device.

22. A dispenser for dispensing a material, comprising:

a pump in communication with the material;

an actuator in communication with the pump to actuate the pump to dispense the material during a dispense event;

a battery; and

a rechargeable energy storage device, wherein the battery and the rechargeable energy storage device are in series during the dispense event such that the actuator receives power from the battery and the rechargeable energy storage device during the dispense event,

wherein the battery and the rechargeable energy storage device are in parallel in the absence of the dispense event such that the battery recharges the rechargeable energy storage device.

23. The dispenser of claim 22 , comprising:

a refill unit containing the material, wherein the pump is in communication with the refill unit and the battery is on the refill unit.

24. The dispenser of claim 23 , comprising:

a housing, wherein at least one of the pump, the actuator, or the rechargeable energy storage device is on the housing and the refill unit is selectively attachable to the housing.