I was going to say something similar. I often use USB power supplies that came from old phones&#x2F;laptops for my various little robot&#x2F;gizmo projects. I do this with the (naive) assumption that If I&#x27;m Apple&#x2F;Dell&#x2F;Samsung&#x2F;etc. I don&#x27;t want to taint my products because of bad power supplies.<p>Other than using my non-pro knowledge and tools to roughly test voltage stability, sustained amperage, and output voltages on some of the power supplies, I don&#x27;t have any hard evidence that this is true- but if I&#x27;m choosing between an Apple USB power supply or a no-name power supply from Amazon for a project, I&#x27;m taking the Apple one because I can assume it&#x27;s a minimum level of quality that&#x27;s good enough for my use. I&#x27;ve got a couple of iPad USB power adapters that I guard pretty closely because the other USB power supplies I have that say they&#x27;re good for at least an amp or two are from no-name suppliers.