Abstract: A flashlight assembly unit for connecting a flashlight to an external power supply such as a rechargeable cellular telephone battery. The power supply unit includes a housing and a pair of terminals positioned on the housing, the pair of terminals including a positive terminal and a negative terminal. A first flashlight is positioned within the housing and connected to the pair of terminals. A clamp releasably secures the external power supply to the housing such that a positive and negative terminals contact both a positive and negative terminal on the external power supply, respectively.

Abstract: A DC power supply unit (30) comprising a flashlight (32). A rechargeable cellular telephone battery (34) is provided, having a positive terminal (36) and a negative terminal (38). The rechargeable cellular telephone battery (34) is supported in the flashlight (32). An adjustable structure (40) is in the flashlight (32) for electrically connecting the flashlight (32) to the positive terminal (36) and the negative terminal (38) of the rechargeable cellular telephone battery (34), so that the rechargeable cellular telephone battery (34) can operate the flashlight (32). A facility (42) in the flashlight (32) is for electrically connecting the rechargeable cellular telephone battery (34) to a remote electrical device, so that the rechargeable cellular telephone battery (34) can operate the remote electrical device.