Hi terminator,
My buddy Pete uses 11.1v 1100mAh 15/30c in his Firehawk.
He said:
"Yeah because of the buffer tube it's quite a tight fit. Can't really go too much higher than 1100mAh."
REALLY impressive with the 11.1 in there though, I can tell you that much.
I had a go on it Thursday and mine felt sluggish like some old steam engine afterwards. I had proper lipo envy :lol: