I've never had much luck with laptop power adapters over the years (had to replace every dell adapter I've ever had and a couple of aftermarket ones). Had to replace the magsafe for my late 2008 macbook once, but I bought the macbook and power adapter used, so I can't quite vouch for how well it was treated prior to me owning it. Bought a cheap aftermarket magsafe adapter and it's been running well for over a year now.