DJI Phantom 4 Intelligent Flight Battery with extra Free Luckybird USB Reader The Phantom 4 - Intelligent Flight Battery is a 5350mAh, 15.2V LiPo battery that is specifically designed for the Phantom 4, enabling optimal performance. The battery also has built-in sensors and bright LEDs that let you know the status and remaining power of your battery in real time. Package included DJI Phantom 4 Intelligent Flight Battery x 1 and Luckybird USB Reader x 1