So I took a couple of test flights this morning flying a Nikon D800e. Here's the setup CS8, QC motors, 14x4.7 props. Flew with both a QC6200 4S and a Zippy 4S. Total weight was right at 5700g. Camera is 1300g with lens. 4400g for frame and battery. Almost immediately after liftoff my low voltage, set at 13.9, came on. Amps were running at an average of 64 amps. Flight time was right at 4 mins with very limited height or maneuvering. Battery's were pretty hot after flight. BL's were running about 60c and outside temp was 80F. After flight I checked the flight logs and highest amps on a BL was 11.0. Temps looked fine. I was about 10 points down and left on balance when I checked that. Throttle was at 129 for hover. Everything else seemed to be fine and all functions were normal. So a couple of questions to the group. 1. Does this sound pretty normal? I flew my Hasselblad a couple of times a few weeks ago and don't remember getting the low batt alarm so quickly. Flight times/amps were about the same and it was about 900G heavier. 2. Assuming that at 5S would help. I've already upgraded the FC board, etc and just didn't get a chance to fly my QC 5S. 3. Would a higher C rating battery make any appreciable difference? And lastly I could always upgrade motors/BL Controllers but since I was hovering right at where I expected from ecalc not sure that it is a motor/prop issue. Looking forward to the wisdom from the group.