Just to point out something for you guys, the standard ac power adaptor for the 8890 only puts out 20 V @ 6 amps = 120 W. So the car adaptor from Shoplaptop
would work if it meets its specifications as stated.
Thus at 12V nominal battery voltage it will take about 10 amps to feed the 8890. You need to check if your car cig lighter can support that kind of current without blowing a fuse. A better way is to get an auto electrician to wire in a dedicated cable direct from the battery distribution board. Some newer cars do come with a prewired cable like this tucked away in the dashboard (normally accessible thru the glove box). Oh and if you do get a cable wired in make sure you put an inline fuse in place (probably a 15A) so if things go wrong you won't damage your Sager (forget about the car tho
Just also be aware that if your motor is not running you are going to drain your car battery pretty damn fast as well
Edit: just a caveat here - I read thru Adam's thread on this and he seemed to come up with some other info from Sager confirming the original "does not work" statement. Why I don't know. Tread carefully.