Does Rocky Thompson make this stuff up?
(This can’t be for real.)
On his blog:
… Try to remember there’s an electrified fence right outside your tent when you get up in the middle of the night to take a piss. If a can of Bear Spray doesn’t offer the protection you’re looking for, then you might try lugging some fencing and batteries into the backcountry. The Bear Shock outfit weighs 3.7 pounds with batteries, and stretches around a 30 x 30ft area.
The website claims the batteries will last five weeks and blast someone with 6000 volts of electricity if touched. I say “someone†and not “some bear†since it’s much more likely you’ll walk into it than anything else.
Backcountry.com: The Goat » Blog Archive » Portable Electric Bear Fence to Encircle Your Campsite
more photos – Bear Shock
besthike.com 
See, I don’t see that thing standing up to a yeti at all. And if it won’t protect you from marauding yeti packs, why bother?