Kastar Phantom 2 [Vision] Battery 2-Pack 11.1V 5400mah 59.94wh 10C Extended Spare Replacement Battery for DJI Phantom2 Quadcopter Drone including Vision, and Vision+ Super Long Flight Time - The Kastar Phantom 2 Vision battery can be flown up to 27 minutes covering around 10 miles. Integrated Battery Level Checker - 4 bright LED's built into the battery module display the battery level, can be viewed and monitored during close flying. Safer than Ever - Short protection and large current protection are all integrated into the battery. Increased Battery Life - In the past, if a battery is dropped it may stop working.The Kastar Intelligent Flight Battery`s frame protects the cells, keeping batteries safe. On the original Phantom if the battery isn't disconnected, it will drain and become unusable. The Kastar Intelligent Flight Battery has low voltage protection. Once it reaches a certain limit, it will turn itself off. The Item Include 30-day Money Back and 12-Month Manufacturer Warranty.