uNu DX PLUS Battery Case for iPhone 4 & 4s (Groupon Goods) » $39 Shipped » 3 Color Combinations Available

LINKAGE

Amazon links (for reviews & whatnot):
Black/Black (5.0 of 5 reviews)
Black/Silver (4.5 of 8 reviews)
White/Silver (no reviews)

FEATURES:
• Provides double the battery life for the iPhone 4 and 4S at home or on the road
• Charges twice as fast as the original DX Plus case
• Forged from durable lithium polymer, like a ray gun
• Emulates original design of the iPhone 4 and 4s
• Protective case safeguards screen, back, and sides
• Dimensions: 4.7''x2.4''x0.7''
• The same protection grade as the original DX case made by uNu
• 40% more juice
• 2x faster charging speed
• An Apple "Made for iPhone" certified product
• Extended capacity battery built inside of a light-weight, soft-touch, durable shell
• Adds up to 10 hours of talk time (up to 20 on 2G) and 9 hours of Web browsing on 3G (up to 14 on Wi-Fi) to your iPhone
• Integrated LED power gauge indicator on the back tells you exactly how much juice is left at the push of a button
• Charge and sync your iPhone to iTunes without removing it from the DX plus battery case by using the included USB cable

SCREENSHOTS: