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.
Of course, the proof is in the pudding; since we love pudding, we’re currently putting the two of them through the Cult of Mac’s grueling Test Gauntlet (along with XtremeMac’s InCharge Mobile for iPhone 4 thrown in for good measure). Reviews coming soon.