The Mission 529HC is a USB power converter that can be used to power the Line 6 HX Stomp from a USB source such as a rechargeable battery pack.
You can pick up a simple boost converter online for cheap, but will it work the same? No. No it will not. In this weeks video I talk about how to power the HX Stomp from a pedal board friendly rechargeable power supply without blowing it up.