From what I&#x27;ve experienced, most power supplies are just awful and don&#x27;t hold up at all to their specs, especially current in excess of 500mA.<p>I&#x27;ve been working with LEDs recently (APA102s), and I attempted just doing some testing with 4 meters (60 LEDs&#x2F;m) and a cheap old 5VDC laptop power supply that in theory was rated for 5A+. Didn&#x27;t work so well. Overheating, not providing enough current to keep the LEDs acting stable, power on spike, etc...<p>To solve my problem, I&#x27;ve purchased two 5V 90A Meanwell power supplies, and those seem to work pretty well. But needless to say, I cannot imagine cheap&#x2F;small power adapters working well at all.<p>At my day job, we have some hardware that requires 800mA at peak to run. Even many 1A USB supplies we&#x27;ve found to offer nowhere near that current capacity. And if they do, they frequently fail after a while.