Makita's efficient BL™ brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per battery charge than similar non-brushless tools. Electronic controls efficiently use battery energy to match the changing demands of the application for increased power and speed when needed. With no carbon brushes, the Makita BL™ brushless motor runs cooler and more efficiently for longer life. When powered by two 18 V 5.0 Ah batteries, the efficient brushless motor delivers up to 28 minutes of run-time on dial setting #3 on a single charge. The XBU02PT features Makita Extreme Protection Technology (XPT™). XPT™ is a protective seal inside the tool and is engineered for improved operation in harsh conditions by channeling water and dust from key internal components. It's part of Makita's expanding 18 V lithium-ion system, the world's largest cordless tool system powered by 18 V lithium-ion slide-style batteries. Makita 18 V lithium-ion batteries have the fastest charge times in their categories, so they spend more time working and less time sitting on the charger.