Please see the datasheet for further information. The typical output current is less than 300 mA and is a function of the step-up voltage: the greater the step-up voltage, the less current the unit can supply.
The output voltage typically has a ripple of 100 – 150 mV peak-to-peak; the magnitude is also a function of the step-up voltage. If your application cannot tolerate this ripple, you can decrease it by putting a 100 uF tantalum capacitor between the output and ground.
This board can be purchased by itself or compactly attached to 2-AA and 2-AAA battery holders. This unit is functionally the same as the rectangular VPack boost regulator from Bodhilabs, but the more compact layout might be more desirable for certain applications. For an even smaller, less expensive 5V boost regulator, please consider our 5V boost regulator NCP1402.