Review: Double your iPhone battery life with these 6 smartphone cases

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There is a thriving aftermarket for smartphone cases, some of which just offer protection while others contain a battery that can recharge your phone. In this review, we looked at six of them.

The iPhone 6 has pretty impressive battery life, but there are many apps out there that are downright battery hogs. You can take advantage of battery management apps, such as Battery Manager, Battery Doctor and Battery Life Pro, which look for battery hogging apps and make suggestions on how to maximize battery life, like shutting off Wi-Fi.

Still, you can run down your battery pretty quickly if you do certain things, like gaming, watching videos, or even setting your screen brightness too high. If you don't have a USB cable to charge your phone at your desk or in your car, you could be out of luck.

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