is a cord outputDC20V 3.5A compatablae with mylap top that hasinput19V 2.1A 40Wy

Solution
It might work but it might not be worth the risk. The ratings on both the computer and the charger are nominal ratings and both has plus/minus tolerances.

The amperage rating is OK (3.5A vs 2.1A) because it states what the maximum allowable is. It doesn't mean that it always outputs that amperage. So a charger with a 3.5A rating can safely supply 2.1A. The opposite, however is not true. You can't charge a computer that will draw 3.5A with a charger only rated for 2.5A because the draw will be over the limit of the charger.

The voltage, however, is critical. The voltages usually have a plus/minus range of 10%. So the 19V computer might allow up to 20.9V if it will tolerate the overage. But if the 20V charger runs a voltage over its...

thx1138v2

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Jun 18, 2011
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It might work but it might not be worth the risk. The ratings on both the computer and the charger are nominal ratings and both has plus/minus tolerances.

The amperage rating is OK (3.5A vs 2.1A) because it states what the maximum allowable is. It doesn't mean that it always outputs that amperage. So a charger with a 3.5A rating can safely supply 2.1A. The opposite, however is not true. You can't charge a computer that will draw 3.5A with a charger only rated for 2.5A because the draw will be over the limit of the charger.

The voltage, however, is critical. The voltages usually have a plus/minus range of 10%. So the 19V computer might allow up to 20.9V if it will tolerate the overage. But if the 20V charger runs a voltage over its tolerance 10% that would be 22V and you would be over the laptops limit and could cause damage to the laptop.

You can get a charger for around $10US plus shipping on eBay so why take the chance? I advise against it.
 
Solution