uNu Apple-Certified Power DX Battery Case for iPhone 4/4s
- Lithium polymer battery nearly doubles the life of an iPhone
- 1,700mAh capacity
- Three- to four-hour charge time
- Withstands approximately 500 charge cycles
- Maintains access to all ports and buttons
- Protects the iPhone from scratches, dings, and drops
- 17mm thick
- One-year warranty from uNu
From external batteries to selfie sticks, learn about the gadgets designed to make your smartphone even smarter.
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