Here is a link to the TB48 being sold on Amazon.
Genuine DJI TB48 Battery 5700mAh Intelligent Flight Battery for DJI Inspire 1, Pro V2.0 Quadcopter (2-Pack) Amazon.com: Genuine DJI TB48 Battery 5700mAh Intelligent Flight Battery for DJI Inspire 1, Pro V2.0 Quadcopter (2-Pack) : Toys & Games