Hello Brian, You didn't tell us what prop you're running.
If by "too much battery for the KV" you mean voltage, yes. Capacity, no. 3650 kv on 3s is a pretty hot set up without a lot of motor. Combine that with a 4 min runtime and 4400 Mah on board my guess is you are knocking the bottom out of those cells among other things.
How much capacity was left after a run? (You want 20% min, if you want them to last)
What are the motor ESC temps after a run?
2700 - 2900 kv would be a better choice or drop back to 2s prop
Have fun and good luck!!
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