I was in need of a new adapter after the new puppy got a hold of the original one. Dell was selling theirs for a lot more, so I decided to give this one a go.I'm now disappointed because it does not seem to fit my inspiron 4150 properly. It will work fine for a few minutes, then the cord gets moved the slightest bit...and my comp shuts off! This is really frustrating since I usually use my laptop on the bed and like to change positions every once and a while. Now I have to set it still and hope me getting off the bed won't jilt it too much.If you're looking for anything slightly mobile, get another adapter.