The next revolution in cordless power tools will be driven by lithium-ion batteries. Each Li-ion cell can pack three times the voltage into a cell of the same size and lower weight, allowing power-hungry and ultracompact tools to cut the cord. But trading in your reliable NiCd and NiMH tools for futuristic products like XLi, V28, LXT, LiPower, and Litheon comes with a steep learning curve and a hefty price tag. Assistant editor Justin Fink cuts through the marketing hype and tells you what you really need to know.
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