I don't know why, but when I tried to plug this into my Legion 5 laptop, the charge light comes on, but it pops up a message saying that the adapter isn't powerful enough (it came with a 230 watt adapter) and refuses to charge at all. When I've had similar messages on Dell laptops, it would still charge, just not as fast. I could understand it having issues if I was trying to do some heavy gaming with it, but I only tested it out when it was sitting idle at about 80% battery and it apparently just refused to use the adapter and ran off of the battery instead. I let it sit there idling to see if it would switch over or something until it got down to 60% and just gave up on it and plugged the original adapter back in, which then charged the battery back up in 20 minutes or so. Giving it 2 stars because maybe this works great on other Legion laptops, but it's annoying that Lenovo made it so that this laptop just refuses to use it when it should be plenty of power for normal tasks.