A couple months back Tesla unveiled the Powerwall home battery, which can receive power from solar panels to supply your house with backup or supplemental energy. Here's a different idea. How about building your house out of external battery packs? Hear me out. They're brick shaped, and they're steadily dropping in price. Today you can get an Intocircuit backup battery for just $16 after entering a coupon code.

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The price starts at $23, but it drops once you enter 2TR69NY8 at checkout. The block has two USB ports so you can charge multiple devices at once. One provides 2.1A, while the other does 1A. An LCD screen shows you how much juice you have remaining.

There are two colors available: gray and silver. Both are decent options for a battery-constructed home.