Lazy, bored, call it what you will.

[BrianG]

It's probably just the system pulling more current than the cells can take. I assume the EVX2 probably acts like a larger "pipe" for the current to flow, so the motor(s) are free to pull as much as they need.

[Jeremy1976]

So what is the ESC on the E Revo rated at? Can it handle 2s? If so I will just run them parallel then and have 16000mah on 2s for the time being until I get my MMM.