This rotary hammer is a perfect companion when you take on your building project. You don't need to bother with a cord, since it runs on a rechargeable battery.
From OnBuy
Einhell Cordless Rotary Hammer TE-HD 18 Li-Solo
Robert Dyas
Einhell Power X-Change 18V Cordless Rotary Drill (Bare Unit)
Conrad Electronic
Einhell Power X-Change TE-HD 18 Li-Solo -Cordless hammer drill 18 V w/o battery