I use a heavy duty one for my 500MHz iopeners from http://www.jameco.com for $20. The part number is 169076 and is rated at 2.5A @ 20v. There is a small pot inside which I use to adjust the voltage down to 19v. I also replace the power jack with one from Radio Shack ($1) which better matches the iopener one. It uses a standard PC power cord which you must supply and is about 3 times the size.
Ok, I have measured three of the iopener supplies and get 19.13,19.08,19.10 volts. Close enough to be a 19v supply. The iopener has a switching regulator in it to drop this down to 3.5v and 5v internally so the input voltage is not that critical. People have reported it working on just the raw 12 volts from a car. You can probably run it off the 20 volts that comes from this new supply without any problems. The key thing is the total power (wattage) it can provide which is 35 watts for the stock one and 50 watts for the one I am suggesting. The other nice thing is that it takes 100-240 VAC @ 50/60 Hz so you can take your iopener anywhere in the world. I have just returned from a vacation in a country with 240VAC and used this supply to run my iopener. The only draw back is the large size of the plastic case. The actual internal hardware only takes up about half the volume.
i-opener opener laptop notebook computer help
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