Get a new charger for your Dell Vostro 15 3549 Notebook Ultrabook, It's small and solid made, you don't have to carry a charger from home to office any more, DC output 19.5V, AC input 100V-240V, 1 year warranty and 30 days free return.
I've been searching for a plug to an older Lenova laptop. A friend recommended Chargerbuy.com and there it was...replacement plug
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