Best Mobile Phone Booster: Mophie Juice Pack Air

We’re not trying to exclude those who use smartphones not of the Apple variety—it’s just that the iPhone clearly needs the battery bump the most. While there are myriad new choices of external iPhone battery packs—the Mili PowerSpring 4 comes to mind—none outshines the Mophie Juice Pack Air, which weights a mere 2.5 ounces and incorporates one of the more well-designed cases available

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Best Mobile Phone Booster: Mophie Juice Pack Air