my drMy drones battery is not turning off , the middle two leds  in the battery is lit continuously (as in image) and I am not able to turn on the drone

Sorry to hear about this, it is the sign that the battery had not upgraded successfully. Kindly download DJI Assistant 2 and update it again. Here the link of the software: (https://www.dji.com/spark/info#downloads). Please keep me posted if the issue is still the same. Thanks for your support.