The batteries are warmed up to reach the highest efficiency. How long does it take?
This is dependent on the battery temperature before you start heating. The batteries heat at a rate of approximately 1°C/min (1,8°F/min). For optimum performance the batteries are heated to between 20 and 30°C. However, power is available also at lower temperatures. The charger can provide energy for battery heating while the aircraft is on the ground. During the flight the batteries are kept at a constant temperature. This needs only a small amount of energy, as they are very well isolated.
