I have it since earlier today in operation and so far no problems. The actual power supply is more than twice as large and heavy as that which this was originally in my notebook (for supported the original only 65Watt). The cables are shorter (almost too short). Because of the size and the Kabellaenge there only 4 stars. Standing on the power supply: Sunfone AC Power Supply AC Input: 100-240V ~, 50-60Hz 1.6A max DC output: 120W max 18-21V-, (19V / 4.74A) Anyway, it's very handy to have 2 power supplies if you then nimt his laptop often to the office back home.