DJI TB47 Inspire 1 - Spare Battery When in flight, your remaining battery power is shown live, letting you know how long you can continue to fly. Advanced algorithms calculate the distance of your aircraft and estimated time to return home, letting you know when its time to fly back. The battery reports the voltage of each cell, the total lifetime charges and discharges, and the overall health and battery status. All this helps you keep your Inspire 1 in the air and flying for years to come. Capacity: 4500mAh Flight Time: 18 minutes Only compatible with the Inspire 1