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Can you use a 9V 850MA power supply on a unit requiring 9V 2100MA?
Wiki User
∙ 12y ago
No. A device that requires 2100 ma or 2.1 amps can not receive enough amperage from a power supply that will only deliver 850 ma or .85 amps.
Wiki User
∙ 12y ago
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Can you use a 13v 850ma power supply in place of 13v 800ma?
Yes. The voltage is the same on each. The ma rating of the power supply is the current the supply can handle before burning up. So if your appliance is designed to work on an 800ma supply, an 850ma supply will do fine.
Is there any way to control the voltage output on usb?
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