Install a fresh DJI Intelligent Flight Battery in your Phantom 4 Pro quadcopter and be ready to fly for up to 30 minutes. The "Intelligent" aspect of the battery enables communication that not only shows current capacity inside the app itself, it also calculates remaining flight times according to distance traveled and other factors. While flying, the battery will send an alert to notify you when the minimal capacity is available for a safe flight plan back to the takeoff point. Additionally, an internal battery management system prevents overcharging and over-draining, and when placed in long-term storage, the battery will self-discharge to a safe level in order to maintain cell health.