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Very Basic Question (I think) about AC/USB adapters

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GD_SYR

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Hi,
I have been trying to find an adaptor that will allow me to use a USB outlet as a power source for some of my electronics (not including iPad, iphone, etc). For example I have a iPod docker that has an ac or dc adaptor that you can plug into a conventional socket. What I would like is the same adaptor but instead of it plugging into a socket, for it to plug into a USB (so I can use a portable USB powered battery). I have been looking for something like this but cannot find it, but perhaps I do not know the name of such a device so that is why I have trouble finding it.
I hope this makes sense, but let me know if I can make my question more clear.
Thanks.
 
What I would like is the same adaptor but instead of it plugging into a socket, for it to plug into a USB (so I can use a portable USB powered battery).

Not possible. USB can't deliver enough power.

There are USB iPod docs etc. available. Buy one of them.

What do you mean by "so I can use a portable USB powered battery"? A battery that you can charge from USB? For what device?
 
Sorry if I was not clear. I am not asking about a battery I can charge with a USB- but a portable battery that has a USB port that I can run a device on-i.e. like "plugging it into the wall"- except instead of a socket in a wall, a usb plug into the battery/power source. I am not concerned with how quickly the battery will lose charge, just the ability to connect the ac/dc cord to the USB.
 
I have one too, lol. What I want to do is run something from an ac adaptor with that (the iCarrier) as the power source, but I cannot find a cord that has the connection from this part of an electronic (such as a radio with a detachable power cord- the part that plugs into the radio) and the other side of the cord with a USB, instead of a traditional plug for a wall socket.
This may not exist ... but if it does I would like to know where I can get one.
Thanks!
 
You want 120VAC out of a USB port? Nope, not gonna happen. It could be done but would be woefully low current. You could drag around a UPS but they're not exactly portable.
 
UPS's are dirt common, they usually contain a big heavy SLA battery, a basic one can be had for $30.

What exactly are you trying to make portable?
 
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