The PATENTED DJI Intelligent Flight Battery(for Phantom 2 Vision), is 5200mAh. * Easy to Plug In and Take Out. New connectors make plugging in the battery and pulling it out super easy. * Precise Battery Level Indication Battery levels used to be estimated by measuring voltage. As the motor spins, voltage drops making these estimates inaccurate. The DJI Intelligent Flight Battery monitors the total amount of energy consumed, so it can offer a precise battery level indication. * Super Long Flight Time The Phantom 2 Vision flew for 28 minutes covering around 10 miles. This has never been achieved before. * Integrated Battery Level Checker Find out remaining battery levels whenever you want, without a multi-meter or battery level detector.