PowerSkin for iPhone 4: The Electric Surfer [Review, Battery Case Week]

The PowerSkin for iPhone 4 ($80) is a silicone case with a built-in rechargeable 2,000 mAh battery that claims to double your device’s battery life with patented “XPAL Power” battery technology. Like most battery cases, it uses a mini-USB port to charge and sync your iPhone simultaneously, and you can turn the case on and off when necessary. The four-LED battery indicator will let you know how much juice you have remaining at the touch of a button.

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PhoneSuit Elite: The Honed Athlete [Review, Battery Case Week]

The problem with battery cases is that they’re so big. Wrapping one around the iPhone 4 turns it from slim-and-sleek into a thick brick of a phone; and if you wanted fat and ugly, heck, you would have bought an Android phone.

But the PhoneSuit Elite iPhone 4 battery case ($80) changes everything. It’s the first case I’ve really felt comfortable carrying around in a jeans pocket, and it’s powerful and fast to boot.

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XtremeMac InCharge Mobile: The Genteel Bruiser [Review, Battery Case Week]

Let’s face it: If you have an iPhone 4, you need a battery case. Unless all you’re doing with your iPhone is using it as a $600 mirror.
Luckily there’s no shortage of choice — so we’ve assembled a collection of promising candidates and put them through their paces, the results of which we’ll be revealing in the next few days.

First up is the XtremeMac InCharge Mobile ($80), selected from XtremeMac’s deep line of charging solutions (all of which have been given the “InCharge” moniker).

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