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MiLi Power Spring 4 iPhone 4 External Battery Pack
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MiLi Power Spring 4 iPhone 4 External Battery Pack


Looking for extra mileage on your iPhone 4? You might want to look towards the highly portable MiLi Power Spring 4: it offers up to 6 extra hours on 3G for both talk time and internet usage, and an extra 360 hours worth of standby time.