I had an issue with one of my batteries swelling up. Would go into low battery mode and start loosing power around 55%. Sent that back to get replaced and now i am looking at my other battery and cant really tell if it is swollen or not. It has a little squish to it but not nearly as bad as my other one, plus i dont have any early low battery warnings with this one. My question is if i plus the quad into the computer and im looking at the battery section is there anything that would be a give away of a failing battery? I also noticed sometimes controls are a bit delayed, i thought maybe it was due to the bad battery but today when I was flying it seemed like getting it to come back to me was a little hesitant and then there were times it would shoot forward. It was a bit windy so im not sure if it was just wind gusts holding it back or if this could be another issue?