High power flashlight with polymer shell

1. A flashlight, comprising:

a housing comprising a polymer shell and a metal core disposed substantially within the polymer shell, the housing further comprising a battery chamber;

a bezel comprising a polymer shell, and a light emitting diode (LED) lamp and a metal reflector disposed within the polymer shell of the bezel;

a universal serial bus (USB) connector;

battery charging circuitry configured so that power, supplied through the USB connector, can recharge a battery inserted into the battery chamber if the battery is rechargeable; and

a heat bridge that is thermally coupled to the LED lamp, the metal reflector, and the metal core, the heat bridge conducting heat away from the LED lamp without requiring an outer metal housing or bezel, and diminishing deteriorating effects of high temperatures on the polymer shells of the housing and the bezel.

2. The flashlight of claim 1 , further comprising an end cap in threaded engagement with the housing.

3. The flashlight of claim 2 , wherein

the metal core provides a threaded portion extending beyond the polymer shell of the housing for attachment of the end cap; and

the battery chamber is dimensioned to receive the battery when the end cap is disengaged from the housing.

4. The flashlight of claim 1 , further comprising:

an LED driver that is electrically connected to the LED lamp; and

a switch;

wherein, if the battery is inserted into the battery chamber, the battery is electrically connected through the switch to power the LED driver.

5. The flashlight of claim 4 , wherein the battery comprises a rechargeable lithium ion battery.

6. The flashlight of claim 4 , wherein the battery comprises a non-rechargeable battery.

7. The flashlight of claim 4 , wherein the battery charging circuitry is physically arranged so that, if a non-rechargeable battery is inserted into the battery chamber, a charging voltage powered from the USB connector cannot be applied across the non-rechargeable battery.

8. The flashlight of claim 1 , wherein the polymer shells of the housing and of the bezel comprise polyoxymethylene.

9. The flashlight of claim 1 , wherein the metal reflector comprises aluminum.

10. The flashlight of claim 1 , wherein the metal core comprises aluminum.

11. The flashlight of claim 1 , wherein the heat bridge comprises copper.

12. The flashlight of claim 1 , wherein the output of the LED is at least about 500 lumens.

13. The flashlight of claim 1 , further comprising a foam grip surrounding at least a portion of the polymer shell of the housing.