I just bought the aukey dual one ( again based on my application). I have a small space thats I am trying to make this work in. I also have a couple of the schoshe ones from before but they stick out too far for my setup. I just receved the one I mentioned above. Defective out of the box. You have to keep wiggling the usb cord to keep it connected. Feels like the usb connector on the pad is a little messed up. Build quality is night and day compared to the mophie. I think you can buy that same pad with no charger on ebay for $ 5. They seem pretty generic and cheaply made.
If anybody has a suggestion for a pad that meets the following criteria I would be very greatful
Fast charging( at least 7.5)
USB powered
Rectangular/ phone shaped
Thin- 0.3, possibly .4 inches
No longer than 5.4 inches
Black in color