If you’ve owned an iPhone 6 for the last year, its battery is probably starting to show some age. Hell, even early iPhone 6s reviews say that battery life hasn’t really changed vs. the previous generation. Luckily, you can take matters into your own hands with this $20 MFi-certified battery case. That’s the best price we’ve ever seen for this kind of thing. [1byone 3100mAh iPhone 6/6s Battery Case, $20 with code KRVPRXFJ]

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