Firstly apologies if this topic has been covered elsewhere already. One of my 3 batteries that came with my Mavic air 2 is completely dead , ie nothing happens when I press the button , no leds light up. Nothing happens when I put it on the charging hub or direct to the charging lead. The other two work fine and they have only 15 charge cycles on them. It was working perfect up to this point.Put all three on the hub to charge and in the morning only two were working. Anybody have this issue ? Is it in hibernation mode or just toast ?