USB key Voltage - Techist - Tech Forum

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Old 11-22-2004, 05:48 PM   #1 (permalink)
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Join Date: Feb 2004
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Question USB key Voltage


I have Apacer AudioSteno va210 256 mp3 player

I would like to know what will happen if i'll connect power for it from nokia car charger. i think there is 4V voltage and about 350mA. That player uses 1x1.5V battery but i think that USB port outputs higher voltage so it shouldn't be damaged by 4V.

So i would like to know what is the possibility to damage my mp3 player? what will happen if i connect wires in bad polarity?
And i am wondering what highest voltage can these usb keys take? And what is the exact USB port voltage?

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Old 11-22-2004, 07:18 PM   #2 (permalink)
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Join Date: Jan 2003
Location: US
Posts: 3,313

As far as what voltage the keys can take, I have no idea.

The worst that can happen if you plug in, is that you short out and destroy your MP3 player and maybe short some fuses in your car.
You could say I've been around.
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