+ A DCB184 5 AH LI-ION BATTERY. ALTHOUGH THIS MODEL IS A 2 AH BATTERY BASED MACHINE. IT WORKS JUST AS WELL WITH THE LARGER BATTERIES (4 AH UPWARDS). 1.4J of impact energy, 0-4980 bpm with a no load speed of 0-1060 rpm, ideal for drilling anchors and fixing holes into concrete, brick and masonry from 4mm to 16mm.