So one of my spark batteries have never been used. When I bought the battery, I had also bought a Mavic Air at the time too. Once I had the Mavic Air, Spark got pushed aside for about 8 months. The new battery never even got the first initial charge. I just pulled Spark out and was charging up all the batteries to use again but the new one won’t charge past 2 bars. I can’t power on the drone and I can’t power on the battery when it’s off the drone. Any fix for this or did I kill the battery?