I got this because it's the cheapest AC/DC power supply for my big Alienware 15r3. It does what I would expect from an AC adapter - plug it into the wall and laptop and watch the 'charging' light come on. The size of this thing is very large compared to the original Dell/Alienware adapter. Slightly 2 times thicker, easily weighs 2 times more. Honestly I thought it was a UPS battery - it's so huge. I buy it to have a spare PSU at the office - something cheap (so-called disposable) - so I don't have to crawl under my desk in the office. Home/work and doesn't care if anyone hides with him. For my use it is perfect. However, if you're buying this to replace your existing Dell adapter as a true portable power bank, you'll be disappointed. For the price and the features I give 5 stars. But set your expectations accordingly - with the larger size and weight, this really impacts its use as a portable AC/DC replacement.
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