RCM CRT.5 with NEU 1509 1.5

[lucias]

I was thinking about a NEU 1509 1.5 for my RCM CRT.5.. If I wanted to use my current batteries 2s and 3s 4200 would would this motor drain them? Would I need to get bigger batteries to get a decent run time and stay cool? I am using a mamba max right now...