This is a 5V DC-DC booster, it is based on the mini PFM DC/DC IC CE830. It is an excellent booster. Just input 0.9-5V DC power to it, it will output a stable 5V power.
There with a USB port onboard for 5V out, or you can use the pads on the bottom. Can be used with 2x AA batteries to supply stable 5V for USB-powered devices.
