My battery won't charge past around 76% it's a tb47 and charges up to the third light but when it starts to charge the 4th it stops and the third light flashes 2 times continuously?? I have tried taking the battery down to 5% by flying and then recharging once it has cooled down but it shows same error?? I noticed my 6 cells are all at different levels and don't know how to fix ?? Can anyone help? I took a picture of my cells but I don't know how to add it from my phone?