I'd like to be able to run in standby S3. I can do this manuall by selecting standby from the shutdown menu, and I only draw 150 milliams. I could leave it this way for a week and still not run down my car's battery.
Problem is, the DSATX cuts power to the MB 90 seconds after the pulse is sent to the MB's power pins, so I only gey 90 seconds of time in standby. 90 seconds isn't quite a week.