I ordered one of these.. thought it was a neat idea and am sharing it. I like the portability and reduced power, so its uber safe for cars. The reviews are not glowing, but I cant believe dewalt would make it too brittle.
www.dewalt.com

20V MAX* 550 psi Cordless Power Cleaner (Tool Only)
For portable cleaning on the jobsite or at home with 10X the cleaning power of a garden hose† , the DEWALT 20V MAX* Power Cleaner is the ideal choice. This versatile tool can draw from any fresh water source with an included suction hose for when a garden hose is not easily accessible. The power...
