The 3,350mAh battery pack is modeled after Tesla’s Supercharger monument at the Tesla Design Studio, which you’d probably recognize if you live and breathe the Tesla lifestyle. You would also probably the person interested in a Tesla-branded charging pack, so that works out. It costs $45 and, unfortunately, it’s already sold out.
The company also sells a desktop Supercharger that features a USB port for any charging cable. It costs $45 as well and is also sold out. With that said, you can always make your own charger. You just need a 3D printer and some motivation.