USB DC-DC Step Up Power Module has a switching voltage regulator onboard. The board has a USB connector so it can be integrated to any system easily. Since input voltage is between 1V and 5V, Li-Po and AA batteries and other low voltage batteries can be used with the module. 5V USB output can supply up to 600mA current. Thus you can create your own power bank and make your USB powered system mobile using this module.
USB DC-DC Step Up Power Module has empty pins for connecting inputs. You can solder a male header to use the module with a breadboard or integrate it with other boards or you can use it by directly soldering some wires.