Watch Elon Musk unveil Tesla's Powerwall, a $3K battery for your home to 'change the world'

Electric car maker Tesla Motors is introducing battery systems for homeowners, businesses and utilities.

The only thing that sounds bad about Elon Musk's Powerwall pitch is the price: $3,000 is steep for most people.

They're taking "reservations" now, and deliveries begin this summer.
[via NYT]

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