The smart battery for the DJI Phantom 2, Phantom 2 Vision and Phantom 2 Vision+ is a 5200 mAh, 11.1 V lithium-polymer battery especially designed for this model. It has four LEDs that display the remaining battery capacity. There is no need for a separate balance lead to control charging because power management is handled internally. There are also no connection leads to untangle or connect. The remaining power and charge statuses are indicated by four LEDs. Even though the maximum flight time for this battery is 25 minutes, it always pays to have spares with you. Don’t forget that batteries must be charged using a DJI approved adaptor.