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I am in need of an adapter that will convert an ethernet port into a wireless access point. I have found a handful of devices, but I'm unable to find a device that is battery powered.

Does a self-powered wireless access point even exist?

The particular scenario that I will be using the device for is not your typical computer/PC scenario.

For the curious, here's a bit of background on the problem I'm trying to solve:

I make devices (controllers) that monitor water systems. Our controllers have a Webserver that serves out web pages so that users can configure the controller's settings. Typically, the user will use a cross-over cable to connect directly to the controller's ethernet port with their laptop to gain access to the controller's web pages.

Now that tablets (devices that don't have an ethernet port - iPad, for example) are becoming more common, I need to find a device that will convert the controller's ethernet port into a wireless access point so that the user can connect to the controller's web pages via Wi-Fi or Bluetooth.

It's worth noting that this wireless device that I'm looking for will NOT be permanently installed on the controller. It will be a portable device that the user will use on any of his controllers when he needs to make a connection to the controller.

If you know of a device that will solve the scenario that I mention above, please share your info.

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I don't know of one, but I'd buy several if they existed. –  goblinbox Mar 27 '12 at 18:20
    
@goblinbox - I found a few battery powered Wi-Fi devices. I've added links in an Answer to this post. –  Jed Mar 29 '12 at 0:37
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up vote 1 down vote accepted

Here is a list of battery powered Wi-Fi devices:

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Far out, thanks! –  goblinbox Mar 29 '12 at 0:39
    
Sorta. The last one is Wimax-to-Ethernet (not Ethernet-to-wifi), so it wouldn't work for your purposes. The other two devices might work, but since they're routers and not repeaters the tablet and the controller will be on different subnets so maybe no web server access. –  goblinbox Mar 29 '12 at 0:50
    
@goblinbox - I tested the ZyXEL and Sapido devices and they work great for the problem that I described. I haven't tested the CNET, but it looks exactly like the Sapido. My guess is that the only difference is in the branding. –  Jed Apr 24 '12 at 19:17
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