This replacement is slightly larger than the original Acer adapter but works just fine. It has the UL logo which was one of the reasons I decided to pay a bit more as other laptops caught fire even with the batteries, let alone the power adapter. The original Acer adapter in particular was always hot, so I was very worried about finding a good replacement adapter. While charging, the adapter almost didn't feel warm/hot, definitely not hot. So I am sure that this is a good product that will keep me using the laptop for some time. Please note that I don't know how long the product will last, so I'm giving it 4 stars for now.
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