Originally Posted by
blacksheep
Depends on the vehicle: typical electric the speed control provides the correct voltage.
Nitro, 2s receiver batt, suggest an add on BEC/voltage regulator like these: (or run/risk higher voltage)
http://dimensionengineering.com/SportBEC.htm
http://teamnovak.com/products/BEC/index.html
The item you posted is to reduce short term voltage drops when you punch it, to help the radio. Mostly 4 cell 12th scale.