The DEWALT DCH273 Brushless XR SDS Hammer has a category-leading high speed drilling performance at more than 90 holes (10 x 80mm) per charge. With a rotation stop mode for light chiselling in plaster, tiles and render and impact stop mode for rotary only drilling in wood and metal. The brushless motor and high capacity XR 18 Volt 5.0Ah Lithium-Ion battery platform provide extreme runtime and reduced maintenance. It is fitted with an electronic clutch for consistently-high torque and improved durability and is ideal for drilling anchors and fixing holes into concrete, brick and masonry from 4 to 24mm. Its compact, lightweight and ergonomic design provide improved comfort and support during extended operating periods. It also has a bright white LED with delay feature for improved visibility. Dewalt DCBP518 Powerstack Features Higher max watts out, so there's a greater range of applications Faster speed of application, giving you increased output and more jobs done Improved thermal performance. Pouch cells run cooler in application and dissipate heat better than cylindrical cells Create less heat resistance which means fewer hot pack shutdowns meaning less downtime and more productivity Increased cycle life, which means better performance for longer Fully backwards compatible with all Dewalt XR 18v Tools How do Dewalt DCBP518 5.0ah Powerstack deliver more power? Pouch cells run cooler in application because of their lower resistance. As a result of their increased surface area, heat also dissipates better than cylindrical cells. Less heat build-up means fewer hot pack shutdowns and less downtime.