I have several Etec 1200's, 2s and 3s.
I have only discharged them flying though.
They never get hot, just good and warm.
One of my planes draws 11.5 amps static, but I have only run it like that for like 10 seconds.
It probably unloads in the air and lowers the amps. Also in the air there is some air blowing over the battery.
Still, even after 30 min. of hovering and stuff, not much full throttle, it comes down only warm.
Can you try flying it and see what happens?