We have featured quite a few different battery accessories for the iPhone here at Geeky Gadgets, although the iPhone 4s battery is much better than the previous 3GS and 3G.
If you need to use a battery pack with the iPhone 4 then you may want to check out this new one from Mophie, the Juice Pack Plus, which is designed to double the battery power of the iPhone 4.
The Juice Pack Plus features a 2,000 mAh battery, and as you can see from the photo above it comes in a range of different colors. If you want one, they are available for $100 from Mophie.
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