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When sizing power sources, you must match voltage (which you have done) and make sure the supply can supply enough current to the electronics. If your supply is the 800mA, and the equipment using this needs 2500mA, then the power supply is undersized. If the supply is the 2500mA and the user is 800mA, then your power supply is oversized, and will work just fine.

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12y ago
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13y ago

A: NO the power is less then the 5 v times 1 amp =5watts. It would be perfectly OK if the substitution can be the other way around a 1 amp for .8 amps

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11y ago

Yes you can will take a bit longer because its 0.7 amps u using to charge a 1Amp device. Just dont exceed 1.5 Amps or 1500mA.

1000 mA = 1 Amp

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15y ago

No, 2 amps is 2000 mA, if you connected it the adapter would heat up and more that likely burn the windings out in the transformer of the adapter.

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Q: Can dc 5V 800mA works with 5v 2.5A?
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