how long a MINI runs on batteries ?
what kind of batteries did you use (quality , rechargeables ...) ?
the AC/DC adapter of the WDX provides up to a max of 1700 milliAmpere
the WDX only needs about 250 mA (as I was told)
this could mean about 6 hours of use with 6 AA batteries ...
(no.... the voltage goes down with decreasing battery power ,
-so probably less)
I think that the currency needs of the WDX are similar to those of the MINI
also a car battery and a 12V/9V cheapo adapter would do the trick ...
(then connect the WD to the sound system , and ext triggers to the steerin wheel
)