If you travel with any number of devices, you know that a backup battery can prevent being powerless at just the wrong time. But carrying a bunch of batteries doesn’t exactly make for traveling light. That’s why you should look into a single slim battery like ToughJuice from ZeroLemon. It can bring a charge to a number of devices, from iPhones to MacBooks. And right now, at less than half price, you can get a 30,000mAh ToughJuice for $59.99 at Cult of Mac Deals.