[brushlessboy16]

The reason for the external BEC is because the Mamba max uses a Linear BEC- TH bec's job is to take main battery voltage (~11.1) to 6.0v for the reciever. A linear bec does this using resistance- in the process all the excess energy turns to heat. by using an external switching BEC, the intenal BEC does not have to work nearly has hard, hence less heat.

Switching BEC work like turning a light switch on-and off really fast to lower voltage- much less heat is created.

Hope this helped.


I'd go with a Mamba max and external BEC like the CC BEC