I've got a 3DR Hexacopter that has been using a Turnigy nano-tech 6000mah 4S 25~50C Lipo battery bought at HobbyKing and that has been charged only 2 times.
The last time I've used that battery was about 15 days ago, and I since the weather forecast showed that it would be stormy for too much time, I've decided to discarge that battery completelly to store it safely untill better weather days would come. The discharge was made in the hexacopter untill the propellers didn't move anymore.
Today I decided to recharge the battery and the usual Turnigy Accucel-6 50W 6A Balancer/Charger and i've discovered that it was detected only 2 cells.
I'm afraid that the battery is wasted, for that trying to fix this or charging it like if it was just a 2 cell battery would be too dangerous.
With that said, I would like your to know your oppinion about what might have happened, if it was my fault by having it completelly discharged with the hexacopter, by letting the cells fall bellow 3V per cell (like I've read somewhere which I can't find now), should I had used the Accucel to discharge it, or was it just my bad luck for buying a faulty battery? Anything?
Is there any list of good practices of how to care a Lipo?
Thanks in advance for your replies