If you prefer a long-lasting battery with a base attachment, Ryobi makes that too. The 12V cordless rotary tool and the 18V rotary tool (with the base) are available for $61.50 and $84 ...
The build quality and performance of the Ryobi 16G One+ AirStrike ... hauling it up a ladder and tool-less depth adjustment and nail jam release, which just makes the whole thing a lot more ...