The iSaw might be a signal for the end of the world. There is officially a USB powered chainsaw. The blade is 3/8” and the entire tool weighs about 9 pounds.
The iSaw features rigid-rubber grip handles and a guide bar that extends about 10 inches. I'm unsure as to whether the USB charges the chainsaw or whether plugging it in is the only power source.
Either way, I don’t think chainsaws should be anywhere near wires or computers. But hey, if you think the $60 is worth it, then don’t be scared to have at ‘er.