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Yes the voltage is close enough to work. What you have to be cautious about is the milliamp output of the adapter. Make sure that the output of the adapter is higher than the device that plugs into it.

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10y ago
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12y ago

Possibly.

If the 600mA device is regulated, then yes. If it isn't regulated then the voltage could be significantly higher than 4.5.

If you have access to a voltmeter, connect a 47 ohms resistor across the output of the 600mA unit, and measure the voltage. If it's close to 4.5 it should be safe to use instead of the 100mA unit.

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12y ago

no. 500 mA=0.5 A, just find a cable modem power cord or a netgear power cord, it will transform to the range you need

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11y ago

If the load was designed for a 2-amp adaptor the answer is probably no; a 500 mA one cannot produce enough current (without overheating).

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8y ago

ONLY if the device it's to be used with is capable of operating at the reduced voltage level.

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12y ago

Thats my question?

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11y ago

Yes, that will be safe.

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12y ago

As long as the load is less than 300mA.

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Q: Can a 4.5 v 100mA adapter be substituted by 4.2v 500 ma?
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