I got some clones of these made in China to save money. All in all, pretty happy. Although they really need a heatsink if you want to push 1A continuously, and

I got some clones of these made in China to save money. All in all, pretty happy. Although they really need a heatsink if you want to push 1A continuously, and the IC is so small it is hard to dissipate all that heat. One of them will push as much current as possible until it overheats and shuts off, but the rest seem fine. I plan on trying to use 2 in parallel to make a UPS for my pi. I've used one with good results on a low power IoT door unlocker. When the door is closed, a Qi charger make contact and powers the device. When the door is open, it runs off battery.