Review on High-Quality 90W 20V 4.5A Laptop Charger for Flex 20 C40-05 C50-30 IdeaCentre-C355 C365 C455 ThinkCentre-Tiny-in-One-23 All-in-One PC Desktop+Supply Cord by Jon Estell

I don't usually write reviews, but this power supply could be potentially dangerous. I haven't let it fail and left me without a computer by damaging my computer OR going all the way to possibly catching fire when it's not there, or worse, in the middle of the night. I've bought cheap power supplies in the past, most of us bought here. And they did their job well. During normal use it started making various noises, I unplugged it. Then, after switching back on, a large arcing at the plug, the same strange noises from the power supply. A little spark under load is ok but not as much as it happens, these come back and I write "Defect" on them with a marker so they don't resell them.