section a describes the major components and internal circuits of the bidirectional universal serial bus usb 9 circuit operation section b shows the internal circuit operation of the high power rechargeable flashlight the combination of both circuits are essential to the invention the usb adapter port 9 can be optimized for different situations for example the charging port 39 s physical size and power carrying capabilities to allow high efficiency power across various situations and need not be limited to only one type of adapter it may take other form as shown in fig2 usb a mini a micro ab also this particular adapter port 39 s 9 main characteristic is to be mechanically and electrically coupled with any external device with similar connectivity 10 the external device 10 can be directly coupled to the usb adapter port 9 or through an adapter usb extension cord in section b of fig1 the high power rechargeable flashlight fig3 is controlled when the flashlight power switch 2 sends a signal to the micro controller 5 to tell it that the flashlight mode is active and therefore disable all other features in this scenario the circuitry converts the usb adapter 9 into an input device where current is drawn from an external adapter to recharge the internal battery 1 of the flashlight to power the led light 4 the micro controller 5 processes this information and.