0.9v-5v Boost / Step-up Power Supply Module(USB Connector)

Out current up to 600mAh 

Enter any DC voltage of 0.9V~5V and will output stable 5V DC with an output current of 500~600MA. For instance, the gadget could be fueled by a solitary AA battery (current confinement would be from the battery) 

A precedent; interface 2x AA batteries in arrangement to the suitable +/ - connectors and utilize a USB link to control the objective 5V gadget