My unit arrived on Thursday and I can confirm that the main problem is the short battery life of 1.5 hours or so. Of course, the 256 MB of RAM is not ideal either.
The AC power adapter also tends to fall out of the input on the device. The DC adapter is a much better fit. I may get something like this to address the connector on the device:
http://www.amazon.com/PowerLine-0900.../dp/B000QFIS12.
Overall, it's pretty good but I prefer the SmartQ 7. The Q7 is lighter, runs cooler, and has a much, much longer battery life.
Of course, the ADV3500PC uses XP Home SP2 and that's mainly why I bought the unit. (The built-in GPS and maximum display of 1024x768 were also factors.) There are still times when I need XP for portable applications.
This unit is repackaged by Audiovox as the ADV3500PC and the Jensen NVX3000PC but it's basically the same as the Uren V1.
See the entry in Chippy's database here:
http://www.umpcportal.com/products/UREN/V1.html.
The OEM site is here:
http://uren.co.kr. Also, see
http://www.innowell.co.kr.
The Jensen manual is online here:
http://audiovox2.info/docs/jensen/ma...0PC_DOC_OM.PDF.
If anyone finds info. on where to buy an additional battery or the expansion dock, please let me know.