I'm looking for an iPhone 4/4s battery extender case (like the Moohie juice pack) that is compatible with apply sync docking accesories. For instance, I have a speaker charging station and I'd like to be able to insert and charge my iPhone regardless of the presence of the battery extender case. This means the case would need a sync port on the bottom, just like the iPhone, and so far the only battery extenders I've found that are designed like this are stand alone extenders, not cases. Has anyone come across an accessory like I've described?
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