A drill is a pretty versatile power tool, while an impact driver is built with laser focus on just one task – to power-drive screws. That means that this tool is all about generating (and deploying) phenomenal power with up to 2,900 RPM and 3,500 IPM of torque. That is more than you get in pretty much any cordless drill. To deliver that power, Makita includeds a very high-quality battery. Of lithium-ion construction, it is rated at 3.0 Amps per Hour and 18 Volt max. Yes, there are more powerful batteries out there, but few are as small and compact as this one.