16 - 18 volt batteries, most now come with lithium battieries which
are lighter and have more lasting power, other drills are corded
DETAIL:
The hammer drill also known as a "rotary hammer", "roto-hammer" or "impact drill", is a rotary drill with a hammering action. The hammering action provides a short, rapid hammer thrust to pulverize relatively brittle material and provide quicker drilling with less effort.
