PowerSkin Ships a Bigger, Badder iPhone 4 Battery Case Remember last year, when Energizer debuted its iPhone 4 backpack battery at CTIA? It was actually made by PowerSkin, and it was the less-powerful cousin to the dual (Verizon and AT&T) compatible PowerSkin case just released. Compared with Energizer’s version, PowerSkin’s new case packs more muscle — at 2000 mAh, a whopping third more [...]
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