There are many external batteries on the market, but we’ve seen very few that come with an AC plug. Matter of fact this is the first one we see with one, and that’s great because there’s a number of things you can’t charge through USB alone. Your MacBook Air for instance, requires an AC plug. With the ChargeAll Portable Power Outlet, you can really charge anything, even two items at once. There’s only 12,000mAh, which isn’t really as much as some of its competitors, but that AC outlet really makes a difference. Normally $270, today it’s $185.