Tool and appliance batteries have come a long way in recent decades. From displacing power cords as the predominant power source on the market to the switch from nickel-cadmium to lithium-ion, ...

I've got one of those new lithium-powered chainsaws. I love the thing. It's quiet, it doesn't smell like two-stroke exhaust, and it's lightweight. But the batteries don't last long enough for me to ...