RE: 6v receiver batter
As stated above, a 6 volt pack discharge quicker....Basic Ohm's law..for a given resistance, an increase in voltage will increase current. SO keep in mind if you could get 6 flights out of a 4.8v 1200mah battery, you will likely get 4 maybe 5 out of a 6.0v 1200mah. JUST AN EXAMPLE