about $400; oregonpowernow.com
A 40-volt lithium-ion battery produces enough power to make 125 cuts through a 3-inch-diameter log before it needs recharging. The motor has the guts to fell a small tree, too, yet it's quiet enough to run at sunup on Sunday. And its 14-inch bar, the longest available on a cordless saw, has a built-in sharpener. We appreciate the translucent window that lets you check the level of your bar oil.