Is it alright to use an AC adapter whose plug fits, and is the same voltage, but higher amps that the original for a laptop?

CaptOblivious · 3 months

As long as the voltage matches and the amps on the charger is equal or larger you are fine.

The laptop will not take more current than it requires at the correct voltage even if the supply can provide it.

grishnav · 3 months

As long as the polarity is correct.

http://en.wikipedia.org/wiki/Polarity_symbols

beatles910 · 3 months

If the polarity is correct, you are fine as long as the adapter is rated at a higher amperage than the device. Less current than it can handle is okay, more current than it can handle is fire.

The rating is simply the maximum that it can (safely) do, not what it will be doing.

LoganPhyve · 3 months

It's ok to have some higher amperage, within reason. Current is pulled, while voltage is pushed. You should only drive a circuit with the correct voltage. However, a circuit will only pull the amount of current it needs. So, at or above the amperage rating is ok, but the polarity and voltages must be right on or you will do damage.

You can think of voltage and current in terms of water through a garden hose. Voltage is the water pressure, while current is the volume of water. You will only take the volume that you need, but if the pressure is higher than the hose is rated for, part of your hose will blow. You need bigger diameter pipes (wire gauge) for more current, and thicker insulation (pipe walls) for more pressure (voltage).

[deleted] · 3 months

YES

longhofer · 3 months

It will charge slightly slower.

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