Here’s how to feel a little less guilty about leaving your vampires plugged in. This massive home battery sucks up electrical juice when its cheap, so you can use it when its not. We’d also imagine this thing will make you the envy of your darkened neighbors when the power goes. Bonus: Its got a HAL-9000-esque CPU built in that gives you a Web-based reading on how many kilowatt hours you’re using, letting you keep an eye on on just how much juice that idle Xbox is really sapping. No word on the price, but we’re guessing this is aimed mostly at the “Cribs” set.