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The machine will notice that it isn't getting all the required voltage and won't run.

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Q: Can you use 15V 4A adaptor for your laptop instead of 19V 3.42A?
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Can you use a 9v dc 1000ma adaptor for a device that has 'power input' of 15v dc 800ma?

A: Disregarding the fact of different voltages there is the power to be concerned 9v x 1A = 9W, 15V X .8 = 12W. THE DEVICE WILL BE UNDER POWER.


Can you use 15v instead of 12.5v in creative speaker?

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Yes you can. It will just take a little longer to complete the charge cycle.


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Yes, a small amount. Yes, but it's very low power. Hardly noticable.


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it regulates +15v constant at output.


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