RE: My Trex 600 E will only fly for 30 secs.
Ok, I double checked the ESC, it is programed right. The cutoff point is programmed at 2.9 volts. I did some hovering this morning and took some additional data from each of the batteries. I flew all four batteries again. The speed controller was warm on all flights but I had no trouble holding on to it, so it wasn't overheating.
BATTERY#1 (FLIGHTPOWER EVOLITE 5350MaH) FULLY CHARGED 25.2 VOLTS TOTAL FLIGHT TIME: 30 SECS.
CELL#1 4.2 CELL#2 4.2 CELL#3 4.2 CELL#4 4.2 CELL#5 4.2 CELL#6 4.2
DISCHARGED 24.62 VOLTS
CELL#1 4.09 CELL#2 47.10 CELL#3 4.08 CELL#4 4.10 CELL#5 4.10 CELL#6 4.11
BATTERY#2(FLIGHTPOWER EVOLITE 5350MaH) FULLY CHARGED 25.19 VOLTS TOTAL FLIGHT TIME: 35 SECS.
CELL#1 4.18 CELL#2 4.18 CELL#3 4.19 CELL#4 4.19 CELL#5 4.19 CELL#6 4.18
DISCHARGED 24.62 VOLTS
CELL#1 4.10 CELL#2 4.10 CELL#3 4.11 CELL#4 4.10 CELL#5 4.11 CELL#6 4.10
BATTERY#3 (AIR THUNDER 5000MaH) FULLY CHARGED 25.24 VOLTS TOTAL FLIGHT TIME: 42 SECS.
CELL#1 4.19 CELL#2 4.19 CELL#3 4.19 CELL#4 4.18 CELL#5 4.18 CELL#6 4.19
DISCHARGED 24.45 VOLTS
CELL#1 4.09 CELL#2 4.07 CELL#3 4.09 CELL#4 4.06 CELL#5 4.07 CELL#6 4.07
BATTERY#4(AIR THUNDER 5000MaH) FULLY CHARGED 25.19 VOLTS TOTAL FLIGHT TIME: 60 SECS.
CELL#1 4.19 CELL#2 4.18 CELL#3 4.19 CELL#4 4.19 CELL#5 4.19 CELL#6 4.19
DISCHARGED 24.32 VLOTS
CELL#1 4.06 CELL#2 4.04 CELL#3 4.05 CELL#4 4.04 CELL#5 4.06 CELL#6 4.06
That all being said, all the batteries seem to have good cells in them. Is there any other way a battery could still have good voltage but have a bad capacity? Am I going about this wrong?