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uNu Power DX-1700B Power DX External Protective Battery Case for iPhone 4S & 4 (Matte Black, Fit All Models iPhone 4 & 4S)

The DX battery case for iPhone 4/4s effectively doubles the battery life of the phone with its 1700mAh battery cell and is just 17mm thick. This additional power can translate into an extra 6 hours of talk-time, 30 hours of music playback, and a 240 hours of standby time. There is no need for the user to remove the case in order to to sync-and-charge and use all the iPhones featues. This case also features a 360 degree protection, an ergonomic hand-held fit, and an anti-slip coating. After extensive testing and quality assurance the DX has been awarded the prestigious Made for iPhone certification. In fact the DX has been proven to give quality power even after 500 full recharging cycles! The current battery levels (of the case) is indicated with a the sky-blue 4-LED battery level indicator. The DX comes with a 1 Year Waranty and free Gifts including: 1 x High Quality Screen protector, 1 x Micro Fiber Cleaning Clothe, 1 x USB charge & sync cable.


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  • Apple Certified 30-Pin Connector
  • Built-in Battery  
  • Protective Case  
  • Signal Problem Fix
  • Fully Support Charge and Sync with Case On
  • Smart Switch, Gain more control over charging to enhance Safety
  • Accurate LED power indicator, flashing when battery runs low
  • Perfectly design, offer a full protection only for iPhone 4
  • Battery Capacity: 1700mAh
  • Standby Time: > 210 Hours
  • Call Time: > 5 Hours (3G) / 10 Hours (2G)
  • Browsing Time: > 5 Hours (3G) / 7 Hours (WiFi)
  • Music Time: > 28 Hours
  • Video Time: > 7 Hours
  • Material Lithium Polymer
  • Capacity 1700mAh
  • Dimension 120x62x17 (mm)
  • Charging Time 3-4 hours
  • Life Cycles 500 Cycles
  • Item Content:
  • 1 x Micro USB charging Cord
  • 1 x Micro Fiber screen cleaning cloth
  • 1 x Glossy white battery case for iPhone 4/4S
  • 1 x Transparent Screen protector for iPhone 4/4S

Additional Info

Additional Info

Manufacturer UnU
Model Number Power DX-1700B
Length 8.40
Width 4.80
Height 1.20
UPC Code No
Condition No
Color No
Size No