[SteinHDan]

Bear in mind that a 3S LiPo battery only has an average voltage of 11.1 volts, but when it's full it's 12.6 volts and when it's completely empty it's 9.0 (but you shouldn't drain it that low). If you go for a 4s battery, the average voltage is 4 x 3.7V = 14.8v but the fully-charged voltage is 4 x 4.2v = 16.8v which is a bit high.

When you run your motors with an ESC, the effective voltage to the motor will vary from 0v to the battery voltage when you change the throttle, so unless you always run at full throttle, the motor would very rarely see the full battery voltage. I wouldn't worry too much about matching it perfectly.

Cosworth34677 is right that you can even burn your motors at low voltages, you can actually burn them on most voltages if the motor is stalled. Energy is always preserved, and since it cannot go out into kinetic energy (movement), all of the energy put into the motor must become heat. The stall current can be very high even on low voltages and the heat will build up and burn your motor. A stalled motor almost looks like a short circuit to the battery. If your input voltage is too low to make the motor turn, then you have the stall condition and you will burn the motor, even if the voltage is as low as 3-4 volts (depending on the DC resistance of the motor).

I run the motors I mentioned above on a 3S LiPo and that works well. But I also almost always use a current-limiting ESC to always be sure not to burn the motor (or break the gear box). :-)


Stein :-)