This rotary hammer is a perfect companion when you take on your building project. It runs on a rechargeable battery, so it's completely wireless.
From Amazon
Makita DHR242RMJ 18V Li-Ion LXT Brushless Rotary Hammer - Complete with 2 x 4.0 Ah Li-Ion Batteries and Charger Supplied in A Makpac Case
Powertool World
Makita DHR242RMJ 18v LXT 24mm SDS+ Plus Brushless Rotary Hammer Drill inc 2x 4.0Ah Batts
Travis Perkins
Makita DHR242RMJ 18V SDS+ Brushless Rotary Hammer Drill with 2 x 4AH Batteries - Blue/Black