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Mophie Juice Pack Powerstation Pro
Running navigation apps on your smartphone all day, and playing music or reading in the tent at night? For the serious electronics user, this ruggedized, water-resistant charger is a good choice for backcountry use. It does nothing but charge USB-and micro USB-compatible devices, so the weight is all about the power inside—and you’re not dependent on sunny skies, as with solar panels. Our tester boosted his iPhone 3S from the mid-20-percent mark to 100 percent four times on one trip; on another, he almost got a full iPad charge. It’s also a great gift for dads who travel a lot—no need to search airports for free plugs. Two minuses: The Pro doesn’t come with a wall adapter; you have to charge it via computer. And it’s weightier than many GPS units at a whopping 8 ounces; you have to love your smartphone or be heading out for longer trips to want to carry it. $130; mophie.com