Energizer’s AP1201 case double as a protective casing and also provides extra juice for your iPhone 4. It has a slim profile with two charging methods.

The silicon casing is made of recycled material. The battery is said to almost double the battery life of the iPhone 4. What I like is the profile of this Energizer AP1201. It is very slim and looks quite good on the iPhone 4. The cost is US$69.99.

It has 2 type of charging. One is to charge the iPhone first and then the casing battery. Another is charging the iPhone and casing battery at the same time.

More information at Energizer AP1201 webpage

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