Today my son received his Cradle USB Charger Dock for his BlackBerry Z10. This is a real simple charging dock that comes with an extra charging slot for an additional battery. We found this on Amazon for $9.99 + free shipping , the only draw back is that it’s not eligible for Amazon Prime.
Here is a quick demo video by BlackBerry Ian and a link to the device. You can follow BlackBerry Ian on twitter @ianblackberry.