Your device may have been "bricked."
To prevent counterfeit electronic components from being sold on the market, the original manufacturers of semiconductor companies sometimes "brick" those fake ones that are being sold or even already installed in a product like a Mophie. How?
When MS or Apple update their OSs, they request newer updated drivers and firmwares to these peripheral and accessories manufacturers. This is when the manufacturers of the chips provide updated firmwares with code that are designed to lock out or "brick" any counterfeits chips. The fake chips essentially becomes a useless brick sitting on a circuit board inside your devices rendering your accessory useless too.
But you say all your devices are from MS or Apple direct and therefore must be 100% genuine. And still does not work. Here is why.
FTDI is a chip manufacture that almost monopolized the usb controller chip market for many years. And with explosive growth in USB devices on the market with advancement of phones and other personal gadgets, many counterfeit companies saw an opportunity and decided to make fake usb controllers in massive scale. Of course, all the counterfeit chips had the name FTDI and the model number (FT232RL or similar) written across the chip and even your computers could not tell apart whether it was real or fake. Probably most parts supplier or the manufacturer like Mophie had no way of knowing these were fake components and innocently purchased these chips thinking that they were buying the genuine products.
FTDI realizing these counterfeit issue, they decided to brick all the chips claiming to be FT232 chip that are mounted and installed in your products. This drastic action by the FTDI affected millions of products unknowingly made with counterfeit products useless.
I hope this was helpful.