Makita's proprietary hammer and anvil are made using the highest quality steel and heat hardened to last longer. Electric brake for immediate stops and minimizes kickback. Two piece amature and field along with extremely accessible brushes for serviceability and longer motor life. Accepts all Lithium-Ion slide style batteries. Makita Lithium-Ion provides longer run time, 5 times lower self-discharge (for use any time) and 16 firm holding contact terminals (for constant high power). 15 minute Rapid Optimum Charger and battery communicates throughout the charging process using the built in chip in the battery and built-in CPU chip in the charger. The charger also uses "Active 3 Control" for current control, thermal control and voltage control. 15 minute Rapid Optimum Charger has a built in fan to cool the battery to produce more lifetime work. Comes with a 3 year warranty on tool and 1 year warranty on battery. Makita