I was building a fpv mini quad powered by 4s and needed 12v for the video tx. I recently ordered a few of these just to have in case I needed to buck/boost voltage on something small. I didn't really expect much given the price. This thing saved the day. Its a very light weight solution for powering small low voltage rc devices. Like the poster above said Im not sure of the current capacity but it seems to perform fine with no heat build up.
Buy a couple you never know what you might use it for.