Interesting why it's a 4,000 mAh instead of a 2,000 mAh battery. It looks a bit too thick and heavy to be a nice wallet and 2000 mAh would be more than enough for an iPhone (which is a huge demographic segment).
I like how the Apple Lighting Adapter is an add-on because I'd like the option to charge my other portable electronics with this wallet that are NOT Apple - Cool Product!
HyperDX
KP Duffle