[Overdriven]

It can handle 5s, but the 2s must be hooked up to the BEC side or it will smoke. To find the BEC side: Borrow another 2s and hook it up, turn it on, then disconnect one battery. Note the amount of time it takes for the LED to go out. Repeat with the other battery. The side that goes out quicker is the BEC side. Put a piece of tape or something on the wires to mark it for future refferemce. Watch your gearing, and consider a fan when running 5s though.