How much wattage do I need for my Laptop-Adapter?

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1.) Check the label on the notebook bottom.

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2.) Or check the label of your adapter.

There you can find easily the data you need to calculate the wattage. Voltage(V) x Current(A) = Wattage (W)
Example:
19V x 2.37A = 45W
19V x 3.42A = 65W
19V x 4.74A = 90W

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