The development of efficient blowers for battery-operated vacuum cleaners is exploited to increase the portability of high resolution DMAs. A Halfmini DMA run by the blower of the iRobot Roomba 500 powered by a variable DC voltage is tested with electrosprayed molecular ions and the serum albumin protein. Sheath gas flow rates Q from 13L/min up to 200L/min are controlled, consuming from 0.28 to 12.5W of electrical power. A pack of 6 Li batteries with 3.4 Ah charge capacity would run the DMA blower at 200L/min for 6.5h. The tetraheptylammonium ion monomer peak was completely resolved from the dimer ion even at Q=13L/min, when it was classified at 10V.