Omni voltage direct current power supply

Abstract

A battery operated LED lighting apparatus including: a battery outputting a battery voltage; a light emitting diode or array of light emitting diodes; and a power supply including a boost regulating circuit. The power supply being in communication with the battery and the light emitting diodes such that a constant voltage or constant current is supplied to the light emitting diodes as the battery discharges and the battery voltage falls below the output voltage. In a preferred embodiment the power supply further includes a buck regulator to maintain the proper output voltage when the battery voltage is greater than the output voltage.

What is claimed is: 
     
         1 . A battery operated LED lighting apparatus comprising:
 a battery outputting a battery voltage;   a light emitting diode; and   a power supply including a boost regulating circuit, said power supply in communication with said battery and said light emitting diode such that a constant voltage is supplied to said light emitting diode as said battery discharges, wherein over at least a portion of said discharge cycle said constant voltage is higher than said battery voltage.