Your iPad with Retina display includes a 12W USB Power Adapter for charging directly through an electrical outlet.
Purchase this additional adapter to have a second charger for home or office. Use this compact and convenient USB based power adapter to charge your iPad with Retina display at home, on the road, or whenever it's not connected to a computer. You can connect the adapter directly to your iPad via the Lightning connector.
It's also compatible with iPad mini. Featuring a compact design, this power adapter offers fast, efficient charging. It also charges iPhone and all iPod models.