Spare Battery for the ProFlight X18 Make sure you\'re always prepared for the worst case scenario of a low battery during your flights. With this at your side it can increase your flight time to a further 25minutes and; 50minutes in total (2 fully charged batteries) . There is also space for an extra battery in the case of the droneThe battery takes between 3-4hrs for 100% charge before you fly anywhere please make sure all are charged to 100%. 25minutes of flight time per battery! . 3-4hrs for 100% charge . Extra space within the case for extra batteries