Just got a open box f210 3D have to batterys using a balance charger at 1 amp one battery is walkera the other brand new turnigy 1300mh both only gave me 2 minuts and 33 seconds give or take of flight time.
It was a return to store. But my second battery I just got today is brand new tunigy comp spec charged for 45 minutes and only got 2 minutes and 33 seconds. I had my son time the flight because my first thought was that the original battery was bad.
Does the battery is too bad? or my drone is broken? Change a battery or a drone?
What is your flight temperature? Low temperature can shorten the flight time. If not, maybe your lipo battery broken, you'd better change a new one, I recommend Tattu 1300mah 4s lipo, it suited to your model and it has a long flight time. Wish you like.
Did you properly charge your battery?
Too high or too low temperature may make your battery go empty sooner.