RE: spektrum dx7 "CRASH"
I bought a $1200 Futaba system and it locked out on the 3rd flight, Futaba said the module was outa tune.
Charged me shipping and I mved on...so whatsit that you expect Horizon to do???
4600mah doesnt mean anything unless you have at least a 1amp load on them.
The newer 7000 are flight log capable which would help you in future setups